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HSEB || Model question of Computer Science Class 11

Class: 11 || Subject: Computer Science

important question for computer science grade xi

Unit-3 Number System and Their Conversion

Attempt all the questions

  1. List out the different system with its base. Convert decimal number to binary number. [2+3=5]
  2. Convert to its octal number system. [5]
  3. Subtract from by using 1’s and 2’s complement method. [5]
  4. What is octal number? Convert octal number into hexadecimal number. [1+4=5]
  5. Subtract from using 1’s and 2’s complement method of subtraction. [2.5+2.5=5]
  6. Subtract from using 1’s and 2’s complement method. [2.5+2.5=5]
  7. What is binary number? Convert octal numbers into hexadecimal number. [1+4=5]
  8. What is number system? Convert binary number into base 8 octal number system. [1+4=5]
  9. Subtract from using 1’s and 2’s complement method. [2.5+2.5=5]
  10. What is binary number system? Convert binary number into base 10. [5]
  11. Perform the following [2.5+2.5=5]

a. 10111-10001

b. 11110+11110

12. Subtract from using 1’s and 2’s complement method. [5]

13. Subtract from using 1’s  and 2’s complement method. [5]

14. What is octal number? Convert number into hexadecimal number. [1+4=5]

15. What is number system? Convert hexadecimal number into octal number system. [1+4=5]

16. What is binary number? Convert number into hexadecimal number. [1+4=5]

17. Subtract from using 1’s and 2’s complement method. [5]

18. What is octal number system? Convert hexadecimal number into binary number system. [1+4=5]

19. What is number system? Convert binary number into octal number. [1+4=5]

20. Subtract from using 1’s and 2’s complement method. [5]

21. Subtract from using 1’s and 2’s complement method. [2.5+2.5=5]

22. Convert octal number into binary number. [5]

23. Subtract from using 1’s and 2’s complement method. [2.5+2.5=5]

24. Convert binary number into octal number. [5]

25. Subtract from 1’s and 2’s complement method. [2.5+2.5=5]

26. What is hexadecimal number? Convert hexadecimal number into octal number. [1+4=5]

27. Perform the following [2.5+2.5=5]

a. 11111-10001

b. 1111+1111

28. What is hexadecimal number? Convert hexadecimal number into base 8 number system. [2+3=5]

29. What is binary number system? Convert hexadecimal number into base 8 number system. [2+3=5]

30. What is binary number? Convert into binary. [2+3=5]

31. What is binary number? Convert into binary. [2+3=5]

32. What is hexadecimal number? Convert into hexadecimal system. [5]

33. What is binary number? Convert into decimal number. [5]

34. What is hexadecimal number system? Convert into base 16. [5]

35. What is binary number system? Convert into base 16. [5]

36. What is octal number system? Convert into base 8. [5]

37. Convert the following according to the given instruction [5]

a. into octal number

b. into binary number

38. Convert denary numbers into hexadecimal and back to base two number system. [5]

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