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HSEB MODEL QUESTION  OF COMPUTER SCIENCE
GRADE : 11
Time : 3hrs          F.M. : 75              P.M : 27
Group A (Long Answer Question)

Attempt ALL the questions. [3 X 10 = 30]
1. Draw a well-labeled diagram of typical architecture of a computer system and explain the main function of Control Unit and ALU. [4+3+3]
2. (a) What is an operating system ? Explain any three function of an operating system. [1 + 6]
(b) The “WiMP” environment is much more user-friendly, why ?
            OR
(a)    What is cell addressing and explain different types of cell addressing used    in spreadsheet. [5]
(b)   Write a tag to design your personal web page to link photo family, background and banner page using frame. [5]
3.(a) Define flowchart and pseudocode. Explain their significance in programming. [5]
(b) Write a pseudocode to accept any three numbers and output the largest among them. [5]

Group B (Short Answer Questions)

Attempt any NINE questions. [9 X 5 = 45]
4. Classify the computers according to their generation based on the technology used. [5]
5. Differentiate between analogue and digital computer, explain with examples. [5]
6. What do you mean by number system? Why do digital computers use binary numbers for their operation ? [2 + 3]
7. a)Convert these numbers. [5]
(a)    (126)10 = (?)2
(b)   (11011)2 = (?)10
(c)    (57)8 = (?)2
  b) Perform following operations.
(d)   1011 – 1001
(e)    1110 + 1110
8. State the Demorgan’s theorem and verify it. [5]
9. What are logic gates? Construct the truth table of NOR operation. [5]
10. Write short notes on (any two) : [5]
(a) IDE      (b) SCSI     (c) Wave Camera
11.What are uses of internet ? Write any five search engine name. [5]
12. Differentiate between System Software and Application Software with examples. [5]
13. What are DPT features in MS-Words? Write three features of Presentation Packages. [2 + 3]
14. Write an algorithm and flowchart to print the word “Hello” ten times using “while loop” [5]



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