Bhagya

CBSE Sample Papers for Class 12 Political Science All India – 2013

Time Allowed: 3 Hours                                                                                          Maximum Marks: 100
General Instructions:

1. All questions are compulsory.
2. Question Numbers 1 to 10 are of one mark each. The answers to these questions should not exceed 20 words each.
3.  Question Numbers 11 to 20 are of two marks each. The answers to these questions should not exceed 40 words each.
4. Question Numbers 21 to 30 are of four marks each. The answers to these questions should not exceed 100 words each.
5. Question Numbers 31 to 35 are of six marks each. The answers to these questions should not exceed 150 words each.
6. Question Number 35 is based on the map. Write the answer in your Answer-Book.

SET -I

Question.1. What is the main reason for beginning of the US hegemony in 1991 ? 1
Question.2. Define the ‘Bandwagon strategy’. 1
Question.3. Correct the following sentence and rewrite in your answer book:
The International Monetary Fund has five member countries and they enjoy equal status. 1
Question.4. Mention any two new threats to the security of a state. 1
Question.5. Who was popularly known as ‘the milkman of India’ ? 1
Question.6. What was ‘Bombay Plan’ ? 1
Question.7. Name the two main corttenders who contested the election for the post of President of India in 1969.1
Question.8. Who led the Railway strike in 1974 ? What was its main demand ? 1
Question.9. Which organisation of Assam led the movement against foreign nationals in 1979 ? 1
Question.10. Shetkari Sanghatana and Rayata Sangha belonged to which two respective states ?1
Question.11. Which were the two important features of the Soviet System ? 2×1 = 2
Question.12. State any two consequences of the ‘largest garage sale’ in history. 2×1 = 2
Question.13. What is meant by ‘hegemony’ ? 2
Question.14. Name any four main organs of the United Nations. 2
Question.15. What is meant by the non-traditional notion of security ? 2
Question.16. Mention any two merits of Green Revolution. 2×1 = 2
Question.17. Mention any two important features of Bhartiya Jana Sangh’s ideology. 2×1 = 2
Question.18. What were the two main consequences of Indo-Pakistan conflict of 1971 ? 2×1 = 2
Question.19. Highlight any two issues that dominate the politics of North-East India. 2×1 = 2
Question.20. What does a coalition government mean ? Mention any one example of such a government. 1 + 1 = 2
Question.21. Why is the policy of non-alignment of India criticised ? Explain any two reasons. 2×2 = 4
Question.22. Explain any four factors which make the European Union a highly influential organisation. 4×1 = 4
Question.23. Explain the hegemony of United States as a Hard Power. 4
Question.24. Describe India’s relations with China from Independence to 1962. 4
Question.25. State any four criteria that have been proposed in the recent years for new permanent and non-permanent members of the UN Security Council. 4×1 = 4
Question.26. Explain any four factors responsible for the development of globalisation. 4×1 = 4
Question.27. Who founded the Swatantra Party in 1959 ? Describe any three policies and programmes of this party. 1 + 3 = 4
Question.28. Explain India’s Nuclear policy. 4
Question.29. What reasons, do you think, were responsible for the declaration of emergency in 1975 ? Examine any two reasons. 2×2 = 4
Question.30. In the given political outline map of India, four States have been marked (A), (B), (C),and (D). Identify them with the help of the information given below and write their correct names in your answer-book with their respective serial number and the alphabet concerned : 4×1 = 4
(i) The State from where Chipko Movement began.
(ii) The State related to ‘Operation Blue Star’
(iii) The State which was liberated from the control of Portugal in December 1961.
(iv) The State which has been given a special status under Article 370.

Question.31. Study the passage given below carefully and answer the questions that follow:
The collapse of Communism was followed in most of these countries by a painful process of transition from an authoritarian socialist system to a democratic capitalist system … Privatisation of state assets and corporate ownership patterns were to be immediately brought in.
Questions: 3×2 = 6
(i) Why has the process of transition been described as painful ?
(ii) Which political system existed before the transition and which system replaced it, if any ?
(iii) What does privatisation imply ?
Or
Study the passage given below and answer the questions that follow :
The two superpowers were keen On expanding their spheres of influence in different parts of the world. In a world sharply divided between the two alliance systems, a state was supposed to remain tied to its protective superpower to limit the influence of the other superpower and its allies…. Most countries of Western Europe sided with the US and those of the Eastern Europe joined the Soviet camp.
Questions:
(i) Name the two superpowers.
(ii) Why did the allies want to remain tied with one of the superpowers ?
(iii) Why did the superpowers want to bring other countries into their camps ?
Question.32. Explain any three environmental concerns in global politics. 3×2 = 6
Or
Explain the concept of globalisation and any two reasons for resistance to it. 2 + 4 = 6
Question.33. “Congress had remained a social and ideological coalition for a long period.” Justify the statement. 6
Or
Assess the outcomes of the early phase of planned development in India.
Question.34. Mention any six steps taken for the restoration of dominance of the Congress Party after the 1971 elections. 6×1 = 6
Or
Mention any six factors responsible for the defeat of the Congress Party in 1977 elections.
Question.35. What are popular movements ? Describe any four benefits of popular movements. 2+4 =6
Or
Highlight any three issues on which a broad agreement has emerged among most of the political parties in India. 3×2 = 6

SET – II

Question.1. What was the objective of founding the European Union ? 1
Question.5. Name any two opposition parties which were part of an electoral alliance in 1971, known as ‘Grand Alliance’. 1
Question.7. Name the present General Secretary of the United Nations who belongs to Asia. 1
Question.9. What was significant about PC Mahalanobis ? 1
Question.10. When was the first democratic election to Sikkim Assembly held and which party swept the elections ? 2
Question.13. Mention the names of any four permanent member states of the UN Security Council. Commissioner ? 1 + 1 = 2
Question.22. Describe any four main events of India’s war with Pakistan in 1965. 4 x 1=4
Question.24. Explain the new economic policies of China since 1978. 4
Question.26. Explain any two causes which led to the formation of ASEAN. 2×2 = 4
Question.28. Explain any four steps taken by the Government of India to curb the emission of green house gases. 4x 1 = 4
Question.35. Describe the growth and characteristics of the Farmers’ Movement led by Bharatiya Kisan Union since 1988. 6
Or
Describe the Assam Movement against the outsiders from 1979 to 1985.

SET – III

Question.2. Name the leader who had given up active politics, but was invited to lead the students’ movement in Bihar in 1974. 1
Question.3. Mention the main function of the World Trade Organisation. 1
Question.9. Who is the ex-officio chairperson of the Planning Commission of India ? 1
Question.13. Which are the two forms of cooperative security as per its traditional notion ? 2×1 = 2
Question.17. Name the pro-Soviet and pro-China factions of the Communist Party of India after the split. 2×1 = 2
Question.22. Explain any four causes of India’s war with Pakistan in 1971. 4×1 = 4
Question.24. How is democratisation going on in Nepal since 1990 ? 4
Question.26. What does SAARC stand for ? Highlight its any three main objectives. 1 + 3 = 4
Question.28. What is the meaning of ‘global commons’ ? Explain any two reasons for the dwindling of global commons. 2×2 = 4
Question.35. What is Sardar Sarovar Project ? What are the achievements of this movement ? Why is it being opposed ? 3×2 = 6
Or
Describe any two secessionist movements of North-East India. 2×3 = 6

CBSE Sample Papers for Class 12 Political Science Delhi – 2013

Time Allowed: 3 Hours                                                                                          Maximum Marks: 100
General Instructions:

1. All questions are compulsory.
2. Question Numbers 1 to 10 are of one mark each. The answers to these questions should not exceed 20 words each.
3.  Question Numbers 11 to 20 are of two marks each. The answers to these questions should not exceed 40 words each.
4. Question Numbers 21 to 30 are of four marks each. The answers to these questions should not exceed 100 words each.
5. Question Numbers 31 to 35 are of six marks each. The answers to these questions should not exceed 150 words each.
6. Question Number 35 is based on the map. Write the answer in your Answer-Book.

SET -I

Question.1.What is meant by ‘9/11’ in the context of USA ? 1
Question.2.Correct the following statement and rewrite :
ASEAN stands for ‘Association of South East African Nations’. 1
Question.3.How many Permanent Members and how many Non-permanent Members does the UN Security Council have ? 1
Question.4.What is meant by ‘Security’ ? 1
Question.5.What is the ‘Two Nation Theory’ advanced by the Muslim League ? 1
Question.6.Name the founder President of the Congress Socialist Party. What name was given to this Party after 1948 ? 1
Question.7.After which General Election in India did Congress Party lose its dominance for the first time at the Centre ? 1
Question.8.After the death of Lai Bahadur Shastri, which two leaders of the Congress Party contested against one another to become leader of the Congress Parliamentary Party ? 1
Question.9.Name the popular movement which demanded that no forest exploiting contract should be given to any outsider. 1
Question.10.From which year did the era of Coalition Governments at the Centre begin in India ? 1
Question.11.Name the two superpowers responsible for Cold War. When did the world become unipolar? 1+1=2
Question.12.What is meant by ‘Shock Therapy’ ? 2
Question.13.When was the ASEAN Regional Forum established ? What was its main objective ? 2
Question.14.Explain the traditional concept of ‘Security’. 2
Question.15.Why are International Organizations like the UN required ? 2
Question.16.Which four Princely States of India initially resisted to join-the Indian Union ? 2
Question.17.Which are the two models of development ? Which model of development was adopted by India ? 1+1=2
Question.18.What is India’s Policy of Non-alignment ? 2
Question.19.Mention any two issues of concern related to development projects such as Sardar Sarovar Project. 2×1=2
Question.20. Highlight any two recommendations of the Mandal Commission. 2×1=2
Question.21. Explain any two reasons for the disintegration of the USSR. 2×2=4
Question.22. List any four ‘Directive Principles of State Policy’ given in the Constitution of India for the promotion of international peace and security. 4×1=4
Question.23. Describe any two constraints on American Hegemony. 2×2=4
Question.24. Describe any two major issues of conflict between India and Pakistan leading to the War of 1971. 2×2=4
Question.25. Identify and explain any four new sources of threat to security. 4×1=4
Question.26. Explain any four consequences of globalization. 4×1=4
Question.27. Explain any four reasons for the dominance of the Congress Party in the first three General Elections. 4×1=4
Question.28. Where and when was the organization ‘Dalit Panthers’ formed ? Describe any three of its activities. 1+3=4
Question.29.Why is the ‘Emergency’ and the period around it known as the period of Constitutional crisis ? Explain. 4
Question.30.In the given Political Outline Map of Europe, four member countries of the European Union have been marked A, B, C and D. Identify them with the help of information given below and write their correct names in your answer-book along with their respective serial number and the alphabet concerned 4
(i) An older member of the European Union located between Portugal and France.
(ii) An older member of the European Union located near Belgium and Netherlands.
(iii) Two new members of the European Union.

Question.31. Study the passage given below carefully and answer the questions that follow:
The best way to respond to regional aspirations is through democratic negotiations rather than through suppression. Look at the situation in the eighties-militancy had erupted in Punjab; problems were persisting in the North-East; students in Assam were agitating; Kashmir Valley was on the boil. Instead of treating these as simple law and order problems, the Government of India reached negotiated settlement with regional movements.
Questions:
(i) How are regional aspirations dangerous for the unity of the country ?
(ii) What is meant by democratic negotiations ?
(iii) Who was leading the agitation in Assam ?
(iv) What steps were taken by the Government of India to respond to the regional aspirations? 6
Or
Study the passage given below and answer the questions that follow:
In fact, the BSP under Kanshi Ram’s leadership was envisaged as an organization based on pragmatic politics. It derived confidence from the fact that the Bahujans (SCs, STs, OBCs and religious minorities) constituted the majority of the population and were a formidable political force on the strength of their numbers.
Questions:
(i) Which organization was formed by Kanshi Ram ?
(ii) Give the full form of BSP.
(iii) Name any two religious minorities.
(iv) Why are the Bahujans considered a formidable political force ?
Question.32. ‘States have common but differentiated responsibilities towards environment.’ Analyse the statement giving suitable examples. 6
Or
Analyse India’s stand on environmental issues.
Question.33. Explain any three consequences of partition of British India in 1947. 3×2=6
Or
Explain the process and basis of the reorganisation of States of Indian Union. 6
Question.34. ‘Was the declaration of emergency in 1975 necessary ?’ Support your answer with any three suitable arguments. 3×2=6
Or
Explain any three lessons learnt from the emergency imposed in 1975.
Question.35. What was the Soviet System ? Assess any four features of the Soviet System. 2+4=6
Or
Examine the relevance of the Non-aligned Movement after the Cold War era.

SET-II

Question.2. Name the political party of India which was founded by Acharya Narendra Dev before independence. 1
Question.6. What is meant by ‘Congress Syndicate’ ? 1
Question.8. Mention any one objective of the United Nations. 1
Question.10. The States of which region of India are referred to as the ‘Seven Sisters’ ? 1
Question.13. What is meant by ‘Operation Enduring Freedom’ ? 2
Question.17. Highlight the importance of popular movements. 2
Question.22. Explain any four problems before the Election Commission of India for holding the First General Election. 4×1=4
Question.24. Describe the Nuclear Policy of India. 4
Question.26. Describe any four new econorinic policies of China to make it grow at a faster rate. 4×1=4 Question.28. How has technology contributed to globalization ? Explain. 4
Question.34. Examine any six consequences of disintegration of the Soviet Union. 6×1=6
Or
Assess any three reforms proposed by the United Nations Conference on Trade and Development (UNCTAD) as new trade policy for development. 3×2=6

SET -III

Question.2. When was the Constitution of India ready and signed by members of the Constituent Assembly ? When did come into effect ? V2+Vi=l
Question.6. What is meant by Privy Purse ? 1
Question.8. Mention any one function of the World Bank. 1
Question.10. Mention any one point of agreement included in the Rajiv Gandhi-Longowal Accord. 1
Question.13. Before 1971, which two reasons were a source of resentment among the people of East Pakistan (now Bangladesh) against West Pakistan ? 2×1=2
Question.17. Mention any two demands of the Bharatiya Kisan Union. 2×1=2
Question.22. Explain any two differences between the First Five Year Plan and the Second Five Year Plan. 2+2=4
Question.24. Describe the contribution of Jawaharlal Nehru to shape properly the Foreign Policy of India. 4
Question.25. Identify any four new sources of threat to security and explain them. 4×1=4
Question.26. Highlight any four features of’ASEAN’. 4×1=4
Question.28. Explain .any four reasons due t<? which globalization is resisted. 4×1=4
Question.32. Why did the superpowers have military alliances with smaller countries ? Explain any three reasons. 3×2=6
Or
Give any three examples to show that most of the former Soviet Republics were prone to conflicts and tensions.

CBSE Previous Year Solved  Papers Class 12 Maths Outside Delhi 2015

Time allowed: 3 hours                                                                                          Maximum Marks : 100
General Instructions:

1. All questions are compulsory.
2. Please check that this question paper contains 26 questions.
3. Questions 1-6 in Section A are very short-answer type questions carrying 1 mark each.
4. Questions 7-19 in Section B are long-answer I type questions carrying 4 marks each.
5. Questions 20-26 in Section C are long-answer II type questions carrying 6 marks each.
6. Please write down the serial number of the question before attempting it.

SET I

SECTION – A

Question.1. Write the value of ∆ =

Solution.

Question.2. Write the sum of the order and degree of the following differential equation:

Solution.

Question.3. Write the integrating factor of the following differential equation:

Solution.

Question.4.

Solution.

Question.5. Write a unit vector perpendicular to both the vectors

Solution.

Question.6. The equations of a line are 5x – 3 = 15y + 7 = 3- 10z. Write the direction cosines of the line.
Solution.

SECTION – B

Question.7. To promote the making of toilets for women, an organization tried to generate awareness through (i) house calls (ii) letters, and (iii) announcements. The cost for each mode per attempt is given below: (i)Rs 50 (ii) Rs 20 (iii)Rs 40
The number of attempts made in three villages X, Y and Z are given below:
(i)    (ii)      (iii)
400  300    100
300  250      75
500  400       150
Find the total cost incurred by the organization for the three villages separately, using matrices.
Write one value generated by the organization in the society.
Solution. The number of attempts made in three villages X, Y and Z can be represented by the 3 x 3 matrix.

Hence the total cost incurred by the organization for the three villages separately are Rs 30,000, Rs 23,000 and Rs 39,000.
The organization in the society generated the value of cleanliness for the women welfare.

Question.8.

Solution. Given

OR

Solution.

Question.9. Using properties of determinants, prove the following:

Solution.

Question.10. Find the adjoint of the matrix.

Solution.

Question.11. Show that the function f(x) = | x-1 | + | x +1|, for all x ϵ R, is not differentiable at the points x=-1 and x = 1.
Solution.

Question.12.

Solution.

Question.13.

Solution.

Question.14.

Solution.



OR

Solution.

Question.15.

Solution.

Question.16.

Solution.

Question.17.

Solution.

Question.18. Find the equation of a line passing through the point (1,2, -4) and perpendicular to two lines

Solution. Let the direction ratios of required line be a, b, c, t since, the line is perpendicular to

OR
Find the equation of the plane passing through the points (-1, 2, 0), (2, 2, -1) and parallel to the line

Solution.

Question.19. Three cards are drawn successively with replacement from a well shuffled pack of 52 cards. Find the probability distribution of the number of spades. Hence find the mean of the distribution.
Solution. Let X denote the number of spades when three cards are drawn, then, X is a random variable that can take values 0,1,2,3:
Let E be the event when spade card is drawn,


OR
For 6 trials of an experiment, let X be a binomial variate which satisfies the relation 9P(X = 4) = P(X =2). Find the probability of success.
Solution. Let p denote the probability of getting success and q be the probability of failure.

SECTION – C

Question.20. Consider f: R+ -> [- 9, ∞ ] given by f(x) = 5x²  + 6x – 9. Prove that f is invertible with

Solution.


OR

Solution.

Question.21. Find the value of p for which the curves x²= 9p(9 – y) and x² = p(y +1) cut each other at right angles.

Question.22. Using integration, prove that the curves y² = 4x and x² = 4y divide the area of the square bounded by x = 0, x = 4, y = 0 and y = 4 into three equal parts.
Solution.

Question.23.

Solution.


OR
Find the particular solution of the differential equation (tan^-1y -x) dy = ( 1 + y²) dx, given that x = 1, when y = 0.
Solution.

Question.24. Find the distance of the point P(3,4, 4) from the point, where the line joining the points A(3, – 4, – 5) and B(2, -3,1) intersects the plane 2x + y + z = 7.
Solution. Equation of the line joining the points A(3, – 4, – 5) and B(2, – 3,1) is

Question.25. A company manufactures three kinds of calculators A, B and C in its two factories I and II, The company has got an order for manufacturing at least 6400 calculators of Kind A, 4000 of kind B and 4800 of kind C. The daily output of factory I is of 50 calculators of kind A, 50 calculators of kind B, and 30 calculators of kind C. The daily output of factory II is of 40 calculators of kind A, 20 of kind B and 40 of kind C. The cost per day to run factory I is Rs 12,000 and of factory II is Rs 15,000. How many days do the two factories have to be in operation to produce the order with the minimum cost ? Formulate this problem as an LPP and solve it graphically.
Solution.

Question.26. In a factory which manufactures bolts, machines A, B and C manufacture respectively 30% 50% and 20% of the bolts. Of their outputs 3,4 and 1 percent respectively are defective bolts. A bolt is drawn at random from the product and is found to be defective. Find the probability that this is not manufactured by machine B.
Solution.

CBSE Solved Papers For Class 12 Computer Science (C++) Paper 1

SECTION A

Question 1.
(a) Explain conditional operator with suitable example ? [2]
(b) Which C++ header file(s) are essentially required to be included to run/execute the following C++code:

void main()
 {
 char *wordl="Hello",*word2="Friends";
 strcat(wordl,word2);
 cout<<word1;
 }

(c) Rewrite the following program after removing the syntactical errors (if. any). Underline each correction.

#include
 #include
 #include
 #include
 class product
 {
 int product_code,qty,price;
 char name[20];
 public:
 product()
 {
 product_code=0 ;qty=0 ,price=0 ;
 name=NULL;
 }
 void entry()
 {
 cout<<"\n Enter code,qty,price"; cin>>product_code>>qty>>price;
 gets(name);
 }
 void tot_price() {return qty*price;}
 } ;
 void main()
 {
 p product;
 p.entry(); cout< }

(d) Write the output of the following C++ program code:
Note: Assume all required header files are already being included in the program.

void change(int *s)
 {
 for(int i=0;i<4;i++)
 {
 if (*s<40)
 {
 if(*s%2==0)
 *s=*s+10;
 else
 *s=*s+11;
 }
 else
 {
 if (*s%2 = = 0)
 *s=*s-10;
 else
 *S=*S-11;
 }
 Cout<<*S<<" ";
 S + + ;
 }
 }
 void main()
 {
 int score[]={25, 60, 35, 53};
 change(score);
 }

(e) Write the output of the following C++ program code :
Note : Assume all required header files are already being included in the program. [3]

class seminar
 {
 char topic[30];
 int charges;
 public:
 seminar()
 {
 strcpy(topic,"Registration");
 charges=5000;
 }
 seminar (char t [] )
 {
 strcpy(topic,t);
 charges=5000
 }
 seminar(int c)
 {
 strcpy(topic,"Registration with Discount");
 charges=5000-c;
 }
 void regis(char t[],int c)
 {
 strcpy(topic,t),
 charges=charges+c;
 }
 void regis(int c=2000)
 {
 charges=charges+c;
 }
 void subject(char t[],int c)
 {
 strcpy(topic,t);
 charges=charges+c;
 }
 void show()
 {
 cout<<topic<<"@"<<charges<<endl;
 }
 } ;
 void main()
 {
 seminar s1, s2(1000), s3("Genetic Mutation"), s4;
 s1.show();
 s2.show();
 si.subject("ICT",2000);
 s1.show();
 s2 .regis ("Cyber Crime" , 2500) ;
 s2.show(); ’
 s3.regis();
 s3.show();
 s4=s2;
 s4.show();
 getch();
 }

(f) Observe the following program carefully and attempt the given questions :

#include
 #include
 #include void main()
 {
 clrscr();
 randomize();
 char courses [] [10]={"M.Tech","MCA","MBA","B.Tech"};
 int ch;
 for(int i=1; i<=3; i++)
 {
 ch=random(i)+ 1;
 cout< }
 getch();
 }

I. Out of all the four courses stored in the variable courses, which course will never be displayed in the output and which course will always be displayed at first in the output ?
II. Mention the minimum and the maximum value assigned to the variable ch ?

Answer:
(a) Conditional operator is also known as ternary operator because it requires three operands and can be used to replace simple if-else code. It is used to check the condition and execute first expression if condition is true else execute other.
Syntax:
Conditional expression? Expression 1 : Expression 2;
Explanation:
If the conditional expression is true then expression 1 executes otherwise expression 2 executes.
Example:
int y=10,x;
x=y>10?l:0;
cout<<x;
Output: 0

(b) iostream.h
string.h

(c) #include
 #include
 #include
 #include
 class product
 {
 int product_code,qty,price;
 char name[20];
 public:
 product(){
 product_code=0;qty=0;price=0;
 strcpy(name,NULL);
 void entry()
 {
 cout<<"\n Enter code,qty,price"; cin> >product_code > >qty>>price;
 gets(name);
 }
 int tot_price() {return qty*price;}
 };
 void main()
 {
 product p;
 p.entry();
 cout< }

(d) 36 50 46 42
(e) Registration@5000
Registration with Discount@4000
ICT@7000
Cyber Crime@6500
Genetic Mutation@7000
Cyber Crime@6500
(f) I. M.Tech will never be displayed in the output.
MCA will always be displayed at first in the output.
II. Minimum value of ch=1
Maximum value of ch=3

Question 2.
(a) What do you understand by Function overloading or Functional polymorphism? Explain with suitable example.
(b) Answer the questions(i) and (ii) after going through the following class :

class planet
 {
 char name[20];char distance[20];
 public:
 planet() //Function 1
 {
 strcpy(name, "Venus");
 strcpy(distance,"38 million km");
 }
 void display(char na[],char d[]) //Function 2
 {
 cout<<na<<"has "<<d<<" distance from Earth"<<endl;
 }
 planet (char na[], char d[]) //Function 3
 {
 strcpy(name,na);
 strcpy(distance,d);
 }
 -planet() //Function 4
 {
 cout<<"Planetarium time over!!!"<<endl;
 }
 };

I. What is Function 1 referred as? When will it be executed ?
II. Write suitable C++ statement to invoke Function 2.
(c) Define a class DanceAcademy in C++ with following description :
Private Members

• Enrollno of type int
• Name of type string
• Style of type string
• Fee of type float
• A member function chkfee() to assign the value of fee variable according to the style entered by the user according to the criteria as given below :

Public Members

• A function enrollment () to allow users to enter values for Enrollno, Name, Style and call function chkfee()to assign value of fee variable according to the Style entered by the user.
• A function display () to allow users to view the details of all the data members.

(d) Answer the questions (i) to (iv) based on the following :

class indoor_sports
 {
 int i_id;
 char i_name[20] ;
 char i_coach [2 0]
 protected:
 int i_rank,i_fee;
 void get_ifee();
 public:
 indoor_sports();
 void iEntry();
 void ishow();
 } ;
 class outdoor_sports
 {
 int o_id;
 char o_name[20];
 char o_coach[20]; protected:
 int orank,ofee;
 void get_ofee();
 public:
 outdoor_sports();
 void oEntry();
 void oshow();
 } ;
 class sports:public indoor_sports,protected outdoor_sports
 {
 char rules [20];
 public:
 sports ();
 void registration();
 void showdata();
 } ;

(i) Name the type of inheritance illustrated in the above C++ code.
(ii) Write the names of all the members, which are accessible from the objects belonging to class outdoor_sports.
(iii) Write the names of all the member functions, which are accessible from the member function of class sports.
(iv) What will be the size of the object belonging to class indoor_sports ?

Answer:
(a) It is a method of using the same function or method to work using different sets of input. Function overloading is one of the example of polymorphism, where more than one function carrying same name behave differently with different set of parameters passed to them,

void show()
 {
 cout<<"\n Hello World!";
 }
 void show(char na[])
 {
 cout<<"\n Hello World! Its "<<na;
 }

(b) I. Constructor
It will be executed at the time of object creation.
II. Planet P; p.display (“Pluto”, 7.5 Billion km”);
It will be executed at the time of object creation.

(c) class DanceAcademy
 {
 int Enrollno;
 char Name[20];
 char Style[20];
 float Fee ;
 void chkfee()
 {
 if(strcmpi(Style, "Classical")==0)
 Fee=10000;
 else if(strcmpi(Style, "Western")==0)
 Fee=8000;
 else if(strcmpi(Style, "Freestyle")==0)
 Fee=11000;
 }
 public:
 void enrollment()
 {
 cout<<"Please enter Enrollno,Name,Style"; cin>>Enrollno;
 gets(Name);
 gets(Style);
 chkfee();
 }
 void display()
 {
 cout<<"\n Entered Enrollno, Name, Style and Fee is:
 "<<Enrollno<<"\t"<<Name<<"\t"<<Style<<"\t"<<Fee;
 }
 } ;

(d) (i) Multiple Inheritance
(ii) Data Members: None
Member Functions: oEntry(), oShow()
(iii) registration() , showdata(), oEntry(), oShow(), get_ofee(), iEntry() , iShow(), get_ifee()
(iv) 46 Bytes

Question 3.
(a) Write the definition of a function grace_score (int score [], int size) in C + + , which should check all the elements of the array and give an increase of 5 to those scores which are less than 40.
Example : if an array of seven integers is as follows :
45, 35, 85, 80, 33, 27, 90
After executing the function, the array content should be changed as follows :
45, 40, 85, 80, 38, 32, 90
(b) An array P[30][20] is stored along the column in the memory with each element requiring 2 bytes of storage. If the base address of the array P is 26500, find out the location of P[20][10].
(c) Write the definition of a member function push() for a class Library in C++ to insert a book information in a dynamically allocated stack of books considering the following code is already written as a part of the program :

struct book
 {
 int bookid;
 char bookname[20];
 book *next;
 };
 class Library
 {
 book *top;
 public:
 Library()
 {
 top=NULL;
 }
 void push();
 void pop();
 void disp();
 -Library () ;
 };

(d) Write a user-defined function swap_row(int ARR[ ][3], int R, int C) in C++ to swap the first row
values with the last row values :
For example if the content of the array is :

Then after function call, the content of the array should be :

(e) Evaluate the following POSTFIX expression. Show the status of Stack after execution of each operation separately:
45, 45, +, 32, 20, 10, /, -, *

Answer:

(a) void grace_score (int score [],int size)
 {
 for(int i=0; i<size; i++)
 {
 if(score[i]<40)
 score[i]=score[i]+5;
 cout<<score[i]<<" " ;
 }
 }

(b) Total number of rows= 30
Total size= 2 bytes
Base Address = 26500
LOC (P[I][J]) = BaseAddress+((I-LBR) + (J-LBC) * R)*W
Assuming Lower Bound of Row(LBR)=0
Lower Bound of Column(LBC)=0
Total number of Rows(R)=30
Size of each element(W)=2
LOC(P[20][10])= 26500 +((20-0)+(10-0)*30)*2
LOC(P[20][10])= 26500 +640
LOC(P[20][10])= 27140

(c) void Library::push()
 {
 book *nptr;
 nptr=new book;
 cout<<"Enter values for bookid and bookname"; cin>>nptr->bookid;
 gets(nptr->bookname);
 nptr->next=NULL;
 if(top==NULL)
 top=nptr;
 else
 {
 nptr->next=top;
 top=nptr;
 }
 }

(d) void swap_row(int ARR[][3],int R,int C)
 {
 for(int i=0,j=0;j<C;j++)
 {
 int temp=ARR[i][j];
 ARR[i] [j] =ARR[R-1] [j] ;
 ARR[R-1][j]=temp;
 }
 }

(e)

Hence the final result is 2700

Question 4.
(a) Find the output of the following C+ + code considering that the binary file sp.dat already exists on the hard disk with 2 records in it.

class sports
 {
 int id;
 char sname[20];
 char coach[20];
 public:
 void entry();
 void show();
 void writing();
 void reading();
 }s;
 void sportsreading()
 {
 ifstream i;
 i.open("sp.dat");
 while(1)
 {
 i.read((char*)&s,sizeof(s) ) ;
 if (i. eof())
 break;
 else
 cout<<"\n"<<i.tellg(); 
} 
i.close(); 
} 
void main() 
{ 
s.reading(); 
}

(b) Write a user defined function word_count() in C+ + to count how many words are present in a text file named “opinion.txt”. For example, if the file opinion.txt contains following text:
Co-education system is necessary for a balanced society. With co-education system, Girls and Boys may develop a feeling of mutual respect towards each other.
The function should display the following :
Total number of words present in the text file are : 24
(c) Write a function display () in C++ to display all the students who have got a distinction (scored percentage more than or equal to 75) from a binary file “stud.dat”, assuming the binary file is containing the objects of the following class :

class student 
{ 
int rno;
 char sname [20]; 
int percent; 
public: 
int retpercent() 
{ 
return percent; 
} 
void getdetails() 
{ 
cin>>rno;
 gets(sname);
 cin>>percent;
 }
 void showdetails()
 {
 cout<<rno;
 puts(sname);
 cout<<percent;
 }

Answer:
(a) 42
84

(b) void word_count()
 {
 ifstream i;char ch[20];int c=0;
 i.open("opinion.txt ");
 while (! i .eof ())
 {
 i>>ch;
 C=C+1;
 }
 cout<<" Total number of words present in the text file are: "<<c; }

(c) void display() 
{ 
student s; 
ifstream i("stud.dat"); 
while(i.read((char*)&s,sizeof(s))) 
{ 
if(s.retpercent()>=75)
 s.showdetails ();
 }
 i.close();
 }

SECTION B

Question 5.
(a) Observe the table ‘Club’ given below :

(i) What is the cardinality and degree of the above given table ?
(ii) If a new column contact_no has been added and three more members havg joined the club then how these changes will affect the degree and cardinality of the above given table.
(b) Write SQL commands for the queries (i) to (iv) and output for (v) to (viii) based on the tables ‘Watches’ and ‘Sale’ given below.
Watches

Sale

(i) To display all the details of those watches whose name ends with ‘Time’
(ii) To display watch’s name and price of those watches which have price range in between 5000 -15000.
(iii) To display total quantity in store of Unisex type watches.
(iv) To display watch name and their quantity sold in first quarter.
(v) select max(price), min(qty_store) from watches;
(vi) select quarter, sum(qty_sold) from sale group by quarter;
(vii) select watchname,price,type from watches w, sale s where w.watchid!=s.watchid; (viii)select watch_name, qty_store, sum(qty_sold), qty_storesum(qty_sold) “Stock” from watches w, sales where w.watchid=s.watchid group by s.watchid;

Answer:
(a) (i) Cadinality: 4
Degree: 5
(ii) Cardinality: 7
Degree: 6
(b) (i) select * from watches where watchname like ‘%Time’
(ii) select watch name, price from watches where price between 5000 and 15000;
(iii) select sum(qtystore) from watches where type like ‘Unisex’;
(iv) select watch_name,qty_sold from watches w,sale s where w.watchid=s.watchid and quarter=1;
(v)

(vi)

(vii)

(viii)

Question 6.
(a) Correct the following boolean statements :
1. X+1= X
2. (A’)’ = A’
3. A+A’ = 0
4. (A+B)’ = A.B
(b) Draw the equivalent logic circuit for the following Boolean expression : (A.B) + C
(c)Write the POS form of a Boolean Function F, which is represented in a truth table as follows:

(d) Reduce the following Boolean Expression using K Map :
F(A,B,C,D) = S (0, 1, 3, 5, 6, 7, 9, 11, 13, 14, 15)

Answer:
(a) 1. X+l =1 or X+0=X
2. ((A’)’) = A
3. A + A’= 1 or A . A’=0
4. (A+B)’ = A’. B’
(b)

(c) (P+Q+R).(P’+Q+R).(P’+Q’+R)
(d)

A’B’C’ + D + BC

Question 7.
(a) Identify the type of topology on the basis of the following : [2]
(i) Since every node is directly connected to the server, a large amount of cable is needed which increases the installation cost of the network.
(ii) It has a single common data path connecting all the nodes.
(b) Expand the following :
(i) VOIP
(ii) SMTP
(c) Who is a hacker ?
(d) The following is a 32 bit binary number usually represented as 4 decimal values, each representing 8 bits, in the range 0 to 255 (known as octets) separated by decimal points.
140.179.220.200
What is it ? What is its importance ?
(e) Daniel has to share the data among various computers of his two offices branches situated in the same city. Name the network (out of LAN, WAN, PAN and MAN) which is being formed in this process.
(f) Rehaana Medicos Center has set up its new center in Dubai. It has four buildings as shown in the diagram given below:

Distance between various buildings are as followa:

Number of Computers

As a network expert, provide the best possible answer for the following queries :
(i) Suggest a cable layout of connections between the buildings.
(ii) Suggest the most suitable place (i.e. buildings) to house the server of this organization.
(iii) Suggest the placement of the following device with justification :
(a) Repeater
(b) Hub/Switch
(iv) Suggest a system (hardware/software) to prevent unauthorized access to or from the network.

Answer:
(a) (i) Star Topology
(ii) Bus Topology
(b) (i) Voice Over Internet Protocol
(ii) Simple Mail Transfer Protocol
(c) A computer enthusiast, who uses his computer programming skills to intentionally access a computer without authorization is known as hacker. A hacker accesses the computer without the intention of destroying data or maliciously harming the computer.
(d) It is an IP Address.lt is used to identify the computers on a network.
(e) MAN
(f) (i) Layout 1

Layout 2

(ii) The most suitable place/ building to house the server of this organization would be building Research Lab, as this building contains the maximum number of computers.
(iii) (a) For layoutl, since the cabling distance between Accounts to Store is quite large, so a repeater would ideally be needed along their path to avoid loss of signals during the course of data flow in this route. For layout2, since the cabling distance between Store to Research Lab is quite large, so a repeater would ideally be placed.
(b) In both the layouts, a Hub/Switch each would be needed in all the buildings to interconnect the group of cables from the different computers in each building.
(iv) Firewall

 CBSE Solved Papers For Class 12 Computer Science (C++) Paper 3

SECTION A

Question 1.
(a) Out of the following, find those identifiers, which cannot be used for naming variable, Constants or Functions in a C++ program :

_Cost, Price*Qty, float, Switch,
 Address One, Delete, Numberl2, do

(b) Jayapriya has started learning C++ and has typed the following program. When she complied the following code written by her, she discovered that she needs to include some header files to successfully compile and execute it. Write the names of those header files, which are required to be included in the code.

void main ()
 {
 float A, Number, outcome;
 cin>>A>>Number ;
 outcome=pow (A, Number);
 cout<<outcome<<endl;
 }

(c) Find the output of the following program:

#include
#include
 void main ()
 {
 char Text [] = {"Mind 0 Work
 for (int I = 0; Text [I] ! = '/O', I++)
 {
 if (!isalpha (Text [I]))
 Text [I]='*';
 else if (isupper (Text [I]))
 Text [I]=Text [I] +1;
 else
 Text [I]=Text [1+1];
 puts (text);
 }
 }

(d) Rewrite the following program after removing the syntactical error(s), if any. Underline each correction.

#include<iostream.h>
 const int size=5,
 void main ()
 {
 int Array (size);
 Array={50, 40, 30, 20, 10);
 for int (ctr=0; ctr<size; ctr++); 
cout>>Array [ctr]; }

(e) Find and write the output of the following C+ + program code:
Note: Assume all required header files are already being included in the program.

class market
 {
 long int code;
 float Rate;
 int DD;
 public:
 market () { code = 1000; Rate = 100; DD = 1:}
 void Getcode (long int C, float R)
 {
 code = C;
 Rate = R;
 }
 void Update (int change, int D)
 {
 Rate + = Change;
 DD = D;
 }
 void Status ()
 {
 cout < < "Date : " < < DD < < endl;
 cout < < code < < "#" < < Rate < < endl;
 }
 };
 void main ()
 {
 Market S, T, U;
 S. Getcode (1324, 350);
 T. Getcode (1435, 250);
 S. Update (50, 28);
 U. Update (-25, 26);
 S. Status ();
 T. Status ();
 U. Status ();
 }

(f) Observe the following C+ + code and find out, which out of the given options (i) to (iv) are the expected correct output.Also assign the maximum and minimum value that can be assigned to the variable ‘Go’.

void main()
 { int X [4] ={100, 75, 10, 125};
 int Go = random(2)+2;
 for (inti = Go; i< 4; i++)
 cout<<X[i]<<"$$";
 }
 i. 100$$75 ii. 75$$10$$125$$ iii. 75$$10$$ iv,10$$125$

Answer:

 (a) Price*Qty,
 float,
 Address one,
 do_cost

(b) iostream.h or iomanip.h
math.h
Note:
Ignore any other header files, if mentioned.
complex. h is acceptable in place of match.h
(c) The output of the above program is:
ind ***or k**
(d) The correct program is as follows:

#include
 const int size=5;
 void main ()
 {
 int Array [size];
 Array [ ]={50, 40, 30, 20, 10}
 for (int ctr=0; ctr<size; ctr++)
 cout << Array [ctr];
 }

(e) Date: 28
1324#400
Date : 1
1435#250
Date : 26
1000#75

(f) iv is the correct option.
Minimum value of Go = 2
Maximum value of Go = 3

Question 2.
(a) What is function overloading ? Write an example using C++ to illustrate the concept of function overloading.
(b) Observe the following C++ code and answer the question (i) and (ii):

class E and I
 {
 int Temperature, Humidity;
 char city[30];
 public :
 E_and_I() //Function 1
 {
 Temperature=0; Humidity=0;
 cout<<"set to Zero"<<endl;
 }
 void E and I (int T, int H, char c[]) //Function2
 {
 Temperatrue T; .
 Humidity H;
 strcpy(city, c) ;
 }
 void show() //Function3
 (
 cout«"Temperature«"; "<<Humidity«endl;
 puts(city);
 }
 ~E_and_I //Function4
 ' {
 cout<<"Data Removed! "<<endl;
 }
 }

(i) Fill in the blank lines as Statement 1 and Statement 2 to execute Functions 2 and 3 respectively in the following code:

void main()
 {
 E and I E;
 ............... //Statement 1
 .............. //Statement 2
 } //The end of main function here

(ii) Which function will be executed at the point where “//The end of main()function here” is written in the above code ? What is this function called and executed here is known as ?
(c) Answer the questions (i) to (iv) based on the following code:

class Teacher
 {
 char TNo [50], TName [20], Dept [10];
 int Workload;
 protected:
 float Salary;
 void AssignSal (Float);
 Teacher ();
 void TEntry ();
 void TDisplay ();
 };
 class student
 {
 char Admno [10],
 SName [20],
 Stream [10];
 protected:
 int Attendence, Totmarks;
 public:
 student ();
 void SEntry ();
 void SDisplay () ;
 };
 class School: public student, public Teacher
 {
 char SCode [10], SchName [20];
 public:
 School ();
 void SchEntry ();
 void SchDisplay ();
 };

(i) Which type of inheritance is depicted by the above example?
(ii) Identify the member function(s) that cannot be called directly from the object of the class School from the following:
TEntry ()
SDisplay ()
SchEntry ()
(iii) Write name of all the member(s) accessible from member function of class School.
(iv) If class school was derived privately from class Teacher and privately from class Student, then, name the member function (s) that could be accessed through object of class school.
(d) Define a class TEACHER with the following specifications:
Private Members:
name: 20 characters
subject 10 characters
basic, da, hra float
Salary float
calculate () A function that computes the salary and returns it. Salary is sum of basic, da and hra.
Public Members:
readata () A function that accept data values and invokes the calculate function,
displaydata () A function that prints the data on the screen.

Answer:
(a) C++ enables us to create more than one function with the same name. This is called function overloading. The functions must differ in their parameter list, with a different type of parameter, different number of parameters, or both.

int double(intA)
 {
 return(2*A);
 long Double(long A)
 {
 return(2*A);
 }
 float Double (float A)
 {
 return (2*A);
 }

(b) (i) Statement 1: E.E_and_I(32,5, “Indore”);
Statement 2 : E. Show ();
(ii) Function 4 will be executed. This function is called as destructor, which is excuted when object goes out of scope. [1]
(c) (i) Multiple Inheritence is depicted by the given example. [1]
(ii) TEntry (), as it is declared protected, write, other two are public.

(iii) Teacher ()
 Tentry ()
 TDisplay ()
 Student ()
 SEntry ()
 SDisplay ()
 School ()
 SchEntry ()
 SchDisplay ()
 Salary ()
 Assign Sal ()
 Attendence
 Totmarks
 SCode
 SchName

(iv) The member functions are:

SchEntry ()
 SchDisplay ()

(d) class TEACHER
 {
 char name [20];
 char subject [10];
 float basic, da, hra;
 float salary;
 float calculate ()
 {
 return (basic + da + hra);
 }
 public:
 void readata ( )
 {
 cout<<"\n Enter the teacher name:";
 gets(name);
 cout<<"\n Enter the Subject;";
 gets(subject);
 cout<<"\n Enter the basic salary:"; cin>>basic;
 cout<<"\n Enter the HRA:"; cin>>hra;
 salary=calculate ();
 }
 void displaydata ()
 {
 cout <<"\n Teacher's name is : ";puts (name) ;
 cout<<"\n Subject taught is:";puts(subject);
 cout<<"\n Basic salary is:"<<basic;
 cout<<"\n Da is"<<da;
 cout<<"\n HRA is;"<<hra;
 cout<<"\n Total salary is:"<<salary;
 }
 } ;

Question 3.
(a) Write a C+ + program to sort an array of 10 integers. Sort array showing status of the array after each pass. Assume 10 integers.
(b) An integer array A [40] [30] is stored along the row in the memory. If the element A[20] [25} is stored at 50000. Find out the location of A [7] [10].
(c) Write a function in C++ to print the sum of all the values which are either divisible by 2 or divisible by 3, present in a two dimensional array passed as the argument to the function.
(d) Write a function in C++ to delete an element from a dynamically allocated queue where each node contains a real number as data. Assume the following definition of MYNODE for the same

struct MYNODE
 {
 float NUM;
 MYNODE * Link;
 };

(e) Evaluate the following postfix notation of expression (show status of stack after execution of each operation);
5, 20, 15, -, *, 25, 2, *, +

Answer:

(a) /* Sorting Array and Showing Status of Array After Each Pass*/
 #include
 #include
 void main ()
 {
 int i, array [10], n, j, temp,small, pos;
 clrscr ();n=10;/given in question
 cout<<"Enter size of an array"; cin>>n;
 for (i=0; i<n;i++)
 {
 //Inserting array elements.
 cout<<"Insert"<>array [i];}
 for (i=0;i<10;i++)//program code to sort array
 {small=array[i];
 pos=i;
 for(j=0;j<g;j++)
 {if(array[j]<small)
 {small=array[j];pos=j;}
 }
 tmp=atray[i];
 array[i]=array[pos];
 array[pos]=tmp;
 cout<<"\nArray other pass-"< for(j=0;<10;j ++)
 cout<<array[j]
 }
 //Displaying sorted array.
 cout<<"\n Sorted Array Element Are";
 for (i=0; i<n; i++)
 cout<< array [i] ;
 getch ();
 }

(b)A[i J [ j ] =B+Wx[No.of columns (I-Lr) + (J-Lc ]
 A [ 2 0 ] [ 25 ]=B+2x[ 30x(20-0)+(25-0)]
 5000=B+2x[3Ox (20-0) + (25-0) ]
 B=48750
 A[7][10]=4875Q+2x[30x(7-0)+(10-0)]
 =49190

(c) void Div_2_or_3 (int A [ ] [ ] , int N, int M)
 {
 int Sum=0;
 for (int i=0; i<N; i++)
 for (int j=0; j<M; j++)
 if (A [i] [ j ] %2= = 0 || A[i] [ j ] %3= =0)
 Sum=Sum+A[i][j];
 cout<<Sum;
 }

(d) void QueDel(MyNode*front)
 {
 MYNODE*temp;
 if (front==NULL)
 cout<<"Queue empty" else { temp=front; front=front—>Link;
 delete temp;
 }
 }

(e) Postfix expression :
5, 20, 15, -, *, 25, 2, *, +

Ans. 75

Question 4.
(a) Write a definition for function Economic () in C++ to read each record of a binary file ITEMS. DAT, find and display those items, which costs less than 2500. Assume that the file is created with the help of objects of class ITEMS, which is defined below :

class ITEMS
 {
 int ID; char GIFT [20] ;float cost;
 public :
 void Get ()
 {
 cin>>ID;gets (GIFT) ;cin>>cost;
 }
 void See()
 {
 cout<<ID<<": "GIFT<<": "<<Cost<<endl;
 }
 float Get Cost()
 {
 return Cost;
 }
 }

(b) Write function definition for lower() in C++ to read the content of a text file Book.txt, and count all those leters which are in lowercase.
(c) Find the output of the following C++ code considering that the binary file CLIENTS.DAT exists on the hard disk with records of 100 members.

class Clients
 {
 int cno;charName[20];
 public:
 void In();void out();
 void main()
 {
 fstream CF;
 CF.open("CLIENTS.DAT",ios::binary : ios::in);
 CLIENTS C; ,
 CF.read((char*)&c;sizeof (c));
 CF.read ((char*) &c; sizeof (c) ) ;
 CF.read((char*)&C, sizeof (c));
 int P0S=CF.tellg()/sizeof (c);
 cout<<"PRESENT RECORD: "<<P0S<<endl;
 CF.close();
 }

Answer:

(a) void Economic()
 {
 ifstream f;
 f.open("ITEMS.DAT",ios::binary);
 ITEMS i;
 while(f.read((char*)&i, size of (i))
 {
 if(i.GetCost()<2500)
 i.See ();
 }
 f.close ();
 }

(b) Function in C++ to count the number of lowercase letters in a text file “Book. Txt”:

void lower()
 {
 char ch;
 int count =0;
 ifstream infile;
 infile.open ("Book.Txt") ;
 if (! infile)
 {
 cout << "can't open the file";
 exit ( ) ;
 }
 (while infile, get (ch) !=0)
 {
 if (islower(ch))
 {
 count ++;
 }
 }
 cout <<count;
 }

(c) POS=66/22 = 3
Ans:
Present Record: 3

SECTION B

Question 5.
(a) Give some advantages of DBMS.
(b) Consider the following tables consignor and consignee. Write SQL commands for the statements (i) to (iv) and give the outputs for SQL queries (v) to (viii):
Table: Consignor

Table: Consignee

(i)To display the name of all consignors from Mumbai
(ii) To display the Cnee ID, Cnor Name, Cnor Address, Cnee Name, Cnee Address for every Consignee
(iii) To display consignee details in ascending order of Cnee Name
(iv) To display number of consignors from each city

(v) SELECT DISTINCT City FROM CONSIGNEE
 (vi) SELECT A. Cnor Name, B. Cnee Name
 FROM CONSIGNOR A, CONSIGNEE B
 WHERE A. Cnor ID=B. Cnor ID AND
 B. Cnee City='Mumbai';
 (vii) SELECT Cnee Name, Cnee Address
 FROM CONSIGNEE
 Where Cnee City Not ( 'Mumbai' , 'Kolkata' ) ;
 (viii) SELECT Cnee ID, Cnee Name
 FROM CONSIGNEE
 WHERE Cnor ID='MU 15' or Cnor ID='ND01'

Answer:
(a) Some of the advantages of DBMS are:
(i) DBMS helps to make the data management more efficiently and effectively.
(ii) DBMS provides end users better access to more and better managed data.
(iii) DBMS provides user security and data privacy within the database.
(iv) DBMS provides back up and recovery procedures to ensure data safety and integrity.

(b) (i) SELECT Cnor Name from CONSIGNOR WHERE CITY="Mumbai";
 (ii) SELECT B. Cneee.ID, A. Cnor Name, A.Cnor Address, B.Cnee Name, B.Cnee Address FROM CONSIGNOR A, CONSIGNEE B WHERE B. Cnor ID=A Cnor ID;
 (iii) SELECT * FROM CONSIGNEE
 ORDER BY Cnee Name;
 (iv) SELECT COUNT (City)
 FROM CONSIGNOR
 GROUP BY CITY;

(v) Mumbai
New Delhi
Kolkata
(vi) R Singhal
Rahul Kishore
Amit Kumar
S. Mittal
(vii) P Dhingra
16/j, Moore Enclave
BP Jain
13, Block D, A Vihar
(viii) K019
APROY
MU 05
Rahul Kishore

Question 6.
(a) Verify the following using Boolean Laws
X + Y’ = X.Y + X.Y’ + X’.Y’
(b) Write the Boolean Expression for the result of the Logic Circuit as shown below :

(c) Write the SOP form of a Boolean function F, which is represented in a truth table as follows:

(d) Reduce the following Boolean expression using K-map.
F (A, B, C, D) = I (0, 1, 2, 4, 5, 8, 9, 10, 11)

Answer:
(a) X + Y’ = X.Y + X.Y’ + X’.Y’
Taking R.H.S.
X.Y + X.Y’ + X’.Y’
= X (Y + Y’) + X’.Y’ (grouping)
= X (1) + X’.Y’ (X + X’ = 1)
= X + Y’ (Absorption law)
Hence Verified.

(b) ( (U+V’ ) . (U+W) ) . (V+W’ )
OR
(U+V’).(U+W).(V+W’)

(c) F=A’B’C+A’BC’+AB’C’+AB’C

(d) F (A,B,C,D) = X (0,1,2,4,5,8,9,10,11)
K-Map is as following:

F (A,B,C,D) = AC + AB + BD

Question 7.
(a) Explain one difference between circuit switching and packet switching.
(b) Write the following abbreviations in their full form:
FTP, WAN, WWW
(c) What is NFS?
(d) Write two advantages and two disadvantages of following topologies in network:
(i) BUS Topology
(ii) STAR Topology

Answer:
(a) Packet switching: Packet switching is a combination of both circuit and message switching and it divides the lengthy message in small parts known as Packets.
Circuit Switching: Circuit Switching establishes a communication path between sending and receiv¬ing computers. The path is connected sequence of links between different Switching Nodes.

(b) FTP stands for File Transfer Protocol WAN stands for Wide Area Network WWW stands for World Wide Web.

(c) NFS: NFS stands for Network File System. It is an operating system which allows all network users to access the shared files stored on different types of computers.
(d) Advantages of Bus Topology:
(a) Requirement of short length cable.
(b) Economical, cost of communication media is minimum.
(c) It is flexible and it is quite easy to add new nodes or delete node from the network.
Disadvantages of Bus Topology:
(a) Difficulty in detection of faults because of no centralize control.
(b) Fault in the backbone cable can disrupt the functioning of the whole network.
Advantages of Star Topology:
(a) One device per connection.
(b) Easy to access.
Disadvantages of Star Topology:
(a) Long Length Cables.
(b) Dependency on central node.
(e) (i) Suitable topology is-STAR Topology

(ii) The server should be paced in wing A as it has the maximum number of computers. According to 80 : 20 rule also, server should be placed on A wing.
(iii) The Hub should be placed at each wing of network.

(iv) (a) Private cloud : Private cloud is a cloud infrastructure operated only for a single organization whether managed internally or by a third party & hosted internally or externally.
(b) Public cloud: A cloud is called a public cloud when the services vendered over a network is open for public use. This is not confined to a particular organization or business.