CBSE Class 11 Computer Science Question Paper Set O Solved

Read and download CBSE Class 11 Computer Science Question Paper Set O Solved designed as per the latest question paper pattern and Class 11 examination guidelines issued by CBSE, NCERT and KVS. The past year Question Papers for Class 11 Computer Science have been provided with solutions which will help students to assess their performance and find out topics in Computer Science grade 11 which they need to improve to get better marks in Standard 11 exams. After solving these last year papers also refer to solved Sample Papers for Class 11 Computer Science available on our website to build strong understanding of the subject

1. a. What is the difference between RAM and ROM? 

b. Explain Parallel Port. 

c. What is the difference between CISC and RISC Computers? 

d. What do you mean by Bluetooth? Explain. 

e. What is a Cache memory? Why it is considered crucial for a microprocessors performance?

f. What are the basic characteristics of a Microprocessor? 

g. Explain :
i) InfraRed Port       ii) PS-2 Port

h. Write a note on:
i) DVD’s                ii) Hard Disks

2. a. What will be the sizes of following constants?
„\a‟   and   “\a”

b. Differentiate between a Syntax error and Logical error with examples. 

c. Explain the following terms with examples:
i) Keywords        ii) Escape sequence

3. a. What is a reference variable? What is its usage? 

b. Give the output of the following code:
void main( )
{ cout<< setw(7) << 6666 <<endl;
cout<< setprecision(4) << 36.42187;

c. What is the difference between fundamental and derived data type explain with an example?

4. a. What do you mean by type casting? Explain with an example. 

b. Use conditional operator, to represent the following in C++ :
If income>20000, tax=3000 otherwise tax=1500.

c. Given the following expressions:

(a) Avg = 70 (b) Avg == 70
i) How are these two different?
ii) What will be the result of (a) and (b) if the value of Avg is 80 initially?

d. Construct logical expressions to represent the following conditions:
i) z is odd and negative
ii) donation is in the range 3000 - 4000 or guest is 2

e. Write the output of the following:
i) int x, y, z=4;
y=(x=2, x+z);
cout<< z * y << ‟\t‟ <<y;
ii) int m=5;
int w = ++m + 50;
int y = m-- + 40;
cout<<“w= ”<<w<<”\n”<< “y= ”<<y;

f. Write the corresponding C++ expressions for the following mathematical expressions:
CBSE Class 11 Computer Science Question Paper Set O Solved 1

5. a. Write one limitation and one advantage of a switch statement. 

b. Briefly explain Infinite loop with suitable example. 

c. What is the role of break and continue statement in loop?

d. Rewrite the following code using while loop:

for(int x=5; x<20; x+=2)
cout<< x << endl;
cout<< “end of loop”;

e. Predict the output of the following C++ program:

void main()
{ for(int outer=0 ;outer<2; outer++)
{ for(int inner=1; inner<=7; inner=inner+2)
cout<< inner<<“ “;
cout<< endl; } }

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

void main( )
{int num=4;
{ ans=*num;
} while(num<10) }

g. Rewrite the following code using switch-case statement:

void main( )
{char ch;
cin >> ch;
if(ch == „R‟)
cout<<“Colour is Red ”;
else if(ch == „W‟)
cout<<“ Colour is White ”;
cout<<“Colour is other than Red and White ”;

6. a. Write a program to input three integers and print the smallest of the three.

b. Write a program to accept the number of terms and print the Fibonacci series.
0 1 1 2 3 5 8 13 ………

c. Write a C++ program to generate the following pattern:

d. Write a program to accept two integers and display the LCM and GCD of the two integers. e.g. If the numbers are 4 and 6 then, LCM = 12 and GCD = 2.

7. a. Write a program to accept Sales from the user. Calculate and display commission for the salesman according to the following rates:

Sales                      Commission Rate

30001 onwards         15% of Sales
22001 - 30000         10% of Sales
12001 – 22000          7 % of Sales
5001 – 12000            3% of Sales
0 - 5000                    0% of Sales

b. Write a menu driven program which displays the following menu:


1. Factorial of a number
2. To print ASCII code of an uppercase alphabet.
3. Quit

The program reads a choice (1,2 or 3) from the user and perform the following:
If choice is 1, read an integer and print its factorial.(eg. If number is 5 , output is 120).
If choice is 2, reads an uppercase alphabet and print its equivalent ASCII code. (eg. If
alphabet is B then code is 66).
If choice is 3, then the program should terminate.
Any other choice should display an error message.
The menu should keep on displaying till the user wants it.

c. Write a program to accept an integer and check whether it is palindrome or not and display proper message as output.

d. Write a program to accept the value of x and n and display the sum of the following series:

CBSE Class 11 Computer Science Question Paper Set O Solved 2

Please click on below link to download CBSE Class 11 Computer Science Question Paper Set O Solved



Click to View or Download pdf file
Click for more Computer Science Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Moderation of Marks Class 11 and 12 Board Exams

The portal for moderation and finalization of results for Class-12 is being opened from 16.07.2021 to 22.07.2021. As Board has to declare the result latest by 31.07.2021, schools have been requested to follow the schedule strictly and complete the moderation within...

CBSE Board Examination Scheme of Assessment 2021 2022

A. Academic session to be divided into 2 Terms with approximately 50% syllabus in each term: The syllabus for the Academic session 2021-22 will be divided into 2 terms by following a systematic approach by looking into the interconnectivity of concepts and topics by...

CBSE asks schools to load Class 12 Internal Assessment Marks

This has a reference to the letter no CBSE/COORD/2021 dated 11.02.2021 regarding conduct of the School-Based Assessment (Internal Assessment/Practical/ Project) of Class-XII and uploading the marks by 11.06.2021. It has been observed that some schools have not been...

FAQs on Policy for Tabulation of Marks for Class 10 Board Exams

ON POLICY Question.1 How CBSE will declare the result of Class-X? Answer. Results of Class X Board will be declared on the basis of an objective criterion developed by the Board vide Notification no.CBSE/CE/2021 dated 01.05.2021. Question.2. If any candidate is not...

CBSE Class 12 Evaluation Criteria 2021

SUMMARY OF THE POLICY FOR TABULATION OF MARKS FOR CLASS XII BOARD EXAMINATIONS 2021   1(a) Due to cancellation of the Board examinations, the assessment of theory portion of 80/70/60/50/30 marks will be done by the school based on the following:     Class...

Studies Today