JKBOSE 11th Class Model Paper Computer Science

COMPUTER SCIENCE
CLASS-XI
Max. Marks: 70 TIME: 3 hrs

Note: All questions are compulsory.
General Instructions:
1. This Question paper contains - Four sections A, B, C and D. Each section is compulsory.
2. Section A-Question 1 to 10 comprises of 10 questions of 1 mark each (MCQ‟s, Fill in the blanks,
True/False, Assertion-Reason etc.)
3. Section B-Question 11 to 19 comprises of 09Very Short Answer (VSA)-type questions of 2 marks each.
4. Section C-Question 20 to 28 comprises of 09 Short Answer (SA)-type questions of 3 marks each.
5. Section D-Question 29 to 31 comprises of 3 Long Answer (LSA)-type questions of 5 marks each.
SECTION-A (Very short answer type questions) 10x1
Q1. 1Gb=___________ Mb
Q2. Scanner is an output device. True/False
Q3.Write full form of ALU
Q4. Antivirus is ______________ software.
Q5. Software used to convert an assembly language program into machine language program is
known as
a) compiler
b) assembler
c) interpreter
d) operating system
Q6. What will be the output of following line of code?
print(len(“computer science”))
Q7. What is the use of „\t‟ escape sequence?
Q8. Define a comment.
Q9. <= Is a/an:
a) comparison operator
b) logical operator
c)identity operator
d) assignment operator
Q10: What is a string?

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SECTION-B (Short answer type questions: Type-I) 9x2
Q11. Differentiate between RAM and ROM.
Q12. Differentiate between compiler and interpreter.
Q13. 21010=---------------2
Q14. 13510=----------------8
Q15. Define a program.
Q16.Define identifiers.
Q17. Define logical operators.
Q18.Name two numeric data types.
Q19. What are multiline strings?

SECTION-C (Short answer type questions: Type-II) 9x3
Q20. Why operating system is needed?
Q21. What is a software?Name 2 types of software.
Q22: Convert (73)8 to binary and check your answer by converting the result back to octal
Q23. Write rules for naming a variable in python.
Q24. Explain decimal and octal number systems.
Q25. Explain different types of errors.
Q26. Explain concept of keywords and identifiers.
Q27. Write a program in python to concatenate two strings.
Q28.What is slicing?How a string is sliced from the start of the string?

SECTION-D (Long answer type question) 3x5
Q29. Explain various generations of computers.
(OR)
Define memory. Explain primary and
secondary memory.

Q30.What are characteristics of a good program
(OR)
What is an error? Explain various types of errors in detail
Q31.What is an operator? Explain various assignment operators in detail
( OR)
What is a datatype? Explain any two datatypes in detail

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MARKS DISTRIBUTION
Very Short Short
Long
Sr. Short Answer Answer Total
Unit No. Answer
No. Answer Type-I Type-II Marks
(5 marks)
(1 mark) (2 marks) (3 marks)
1 Unit 1 3 1 - 1 10
2 Unit 2 2 1 2 - 10
3 Unit 3 - 2 2 - 10
4 Unit 4 - 1 1 1 10
5 Unit 5 2 1 2 - 10
6 Unit 6 1 2 - 1 10
7 Unit 7 2 1 2 - 10
10 9*2(18) 9*3(27) 5*3(15) 70

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