#### Number Systems - Important Question Paper

11th Standard

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Computer Science

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. Expansion for ASCII

(a)

American School Code for Information Interchange

(b)

American Standard Code for Information Interchange

(c)

All Standard Code for Information Interchange

(d)

American Society Code for Information Interchange

4. 2$\wedge$50 is referred as

(a)

kilo

(b)

Tera

(c)

Peta

(d)

Zetta

5. How many characters can be handled in Binary Coded Decimal System?

(a)

64

(b)

255

(c)

256

(d)

128

6. Which is considered as the basic unit of measuring the memory size in the computer?

(a)

Bit

(b)

Byte

(c)

Nibble

(d)

Word

7. 4 bits =................

(a)

Bit

(b)

Byte

(c)

Nibble

(d)

Word

8. The number of bits a processor can read/write at a time is called............

(a)

nibble

(b)

word

(c)

byte

(d)

none of these

9. Which is used to measure the number of bits in each word?

(a)

Word length

(b)

length

(c)

Size

(d)

word size

10. A word can have a length of..........

(a)

2,5,10 bits

(b)

15,25,50 bits

(c)

16,32,64 bits

(d)

64,128,255 bits

11. Part B

6 x 2 = 12
12. What does the complement of a number refer?

13. Write the one's complement of 10102 and 1001012?

14. What is a use of coding scheme?

15. Expand EBCDIC and BCD.

16. Expand ASC11 and ISC11

17. What is BCD?

18. Part C

6 x 3 = 18
19. Why is the number conversion necessary?

20. (101010)2 $\rightarrow$ (?10$\rightarrow$ (?10)

21. (300)10  $\rightarrow$ (?2$\rightarrow$ (?8) ​​​​​​​$\rightarrow$ (?)16

22. Describe the parameters are used to determine the value of each digit in a number.

23. Perform the following expressions. (FACE)16 = (?)2

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

25. Part D

2 x 5 = 10
26. Convert the following Decimal numbers to its equivalent Binary, Octal, Hexadecimal. - 255

27. Convert the following Decimal numbers to its equivalent Binary, Octal, Hexadecimal. - 126

### TN 11th Standard Computer Science free Online practice tests

#### 15-May-2019

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