#### Number Systems - Important Question Paper

11th Standard

Reg.No. :
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Computer Applications

Time : 01:00:00 Hrs
Total Marks : 50

Part A

10 x 1 = 10
1. Which refers to the number of bits processed by a computer's CPU?

(a)

Byte

(b)

Nibble

(c)

Word length

(d)

Bit

2. How many bytes does 1 KiloByte contain?

(a)

1000

(b)

8

(c)

4

(d)

1024

3. For 11012 what is the Hexadecimal equivalent?

(a)

F

(b)

E

(c)

D

(d)

B

4. What is the 1's complement of 00100110?

(a)

00100110

(b)

11011001

(c)

11010001

(d)

00101001

5. Which amongst this is not an Octal number?

(a)

645

(b)

234

(c)

876

(d)

123

6. Which is a basic electronic circuit which operates on one or more signals?

(a)

Boolean algebra

(b)

Gate

(c)

Fundamental gates

(d)

Derived gates

7. Which gate is called as the logical inverter?

(a)

AND

(b)

OR

(c)

NOT

(d)

XNOR

8. A + A =?

(a)

A

(b)

O

(c)

I

(d)

A

9. NOR is a combination of?

(a)

NOT(OR)

(b)

NOT(AND)

(c)

NOT(NOT)

(d)

NOT(NOR)

10. NAND is called as ......Gate

(a)

Fundamental Gate

(b)

Derived Gate

(c)

Logical Gate

(d)

Electronic gate

11. Part B

6 x 2 = 12
12. What is data?

13. Write the 1's complement procedure

14. Convert (46)10 into Binary number

15. We cannot find 1's complement for (28)10 State reason.

16. Name the four types of Number system.

18. Part C

6 x 3 = 18
19. Write note on binary number System

20. Convert (150)10 into Binary, then convert that Binary number to Octal.

21. Write short note on ISCII.

22. Perform the following expressions. (COFFEE)16 = (?)2

23. Complete the following Octal numbers 365, 366, 367,.......

24. Write a note on Decimal Number system

25. Part D

2 x 5 = 10
26. Write the steps for converting Decimal to Binary numbers.

27. Convert the Following - (101.10)16 $\rightarrow$  (?2) = (?)10