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MODEL QUESTION PAPER FORSUMMATIVE ASSESSMENT -1I P.U.C COMPUTER SCIENCE

Time: 3 Hours 15 Minutes Max Marks:

70

PART A

I. Answer any NINE of the following questions 9 x 1=9

1. What is a Computer?2. What are the different kinds of memories?3. Expand MOUSE.4. Convert 101101 in binary to decimal.5. How are flowcharts classified?6. What is the different programming constructs?7. Who developed C programming language and where?8. Define a constant.9. What is data?10. What is a compiler?11. What is an icon?

PART B

II. Answer any FIVE of the following questions 5 x 2=10

12. Mention the important features of the second generation computers.13. Compare the features of micro and mini computers.14. Write a note on ASCII code.15. What are the stages in problem solving?16. What are the rules for naming an identifier?17. Mention the different stages in data processing.18. What are the different ways of creating a presentation?

PART C

III. Answer any FOUR of the following questions 4 x 4=16

19. Discuss the characteristics of computers in detail.20. Explain subtraction using 1s complement with a suitable example.21. Give the functioning of the basic gates with truth table.22. What is an algorithm? What are the essential characteristics of developing an

algorithm?23. What do you understand by precedence of operators? Explain with suitable

examples.

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ORWrite a C program to find the largest and smallest of three numbers.

24. Explain the concept of buffered and unbuffered input and output with a suitableexample.

PART D

IV. Answer any FOUR of the following questions 4 x 5=20

25. Explain the components of a computer using a suitable block diagram.26. Classify the different types of printers and the working of any one in detail.27. State and prove any five postulates of Boolean algebra.28. Convert 1234.12 in decimal to binary, octal and hexadecimal.29. Explain problem definition and problem analysis with a suitable example.30. Explain any five DOS commands in detail.

PART E

Answer any THREE of the following questions 3 x 5 =15

31. Explain Basic programming constructs with suitable examples.32. Write an algorithm to swap two numbers.

ORDraw a flow chart to print numbers from 1 to N.

33. Explain the concept and importance of any five mathematical functions used inCprograms.

34. Explain the use of various formatted input and output functions with suitableexamples.

35. Write a program to accept the sides of a triangle and determine the type oftriangle.