Class 11 Computer Science Question Paper 2074 (2017)

Sub.Code: 130’A’

NEB- GRADE XI

2074 (2017)

Computer Science

Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.

Time: 3 hrs

Full Marks: 75

Pass Marks: 27

Group ‘A’

(Long Answer Questions)

Attempt any three questions. 3 X 10 = 30

1. What is computer system? Explain main parts of digital computer? 2 + 8
2. Explain any five functions of operating system. 10
3. What is programming language? Explain algorithm and flowchart with example. 2 + 8
4. Explain OR, AND, NOR and NOT gate with its truth table, symbol and Venn diagram. 10

Group ‘B’

(Short Answer Questions)

Attempt any nine questions. 9 X 5 = 45

5. Explain OR, AND, NOR and NOT gate with its truth table, symbol and Venn diagram. 5
6. Differentiate between Analog & Digital Computer. 5
7. Convert (563)₁₀ to its octal equivalent. 5
8. State and prove De-Morgan’s theorem. 5
9. What is cache memory? Explain the advantages of cache memory. 2 + 3
10. What is Real Time Operating System? Explain. 5
11. Explain different types of errors in program. 5
12. What is word-processing? Explain document formatting. 1 + 4
13. Write the advantages of DBMS. 5

OrExplain the different types of errors in program. 5
14. Write the basic structure of HTML. 5

OrSubtract (10011)₂ from (11110)₂ by using 1’s and 2’s complement method. 5
15. Write short notes on: 2.5 + 2.5 = 5
a) Computer virus     b) Bus architecture.

-0-