**Data representation in computer MCQ**. Questions and answers with PDF for all Computer Related Entrance & Competitive Exams Preparation. Helpful for Class 11, GATE, IBPS, SBI (Bank PO & Clerk), SSC, Railway etc.

## Data Representation in Computer MCQ

1. To perform calculation on stored data computer, uses ……… number system. [SBI Clerk 2009]

(1) decimal

(2) hexadecimal

(3) octal

(4) binary

Ans. 4

2. The number system based on ‘0’ and ‘1’ only, is known as

(1) binary system

(2) barter system

(3) number system

(4) hexadecimal system

Ans. 1

3. Decimal number system is the group of ………… numbers.

(1) 0 or 1

(2) 0 to 9

(3) 0 to 7

(4) 0 to 9 and A to F

Ans. B

4. A hexadecimal number is represented by

(1) three digits

(2) four binary digits

(3) four digits

(4) All of these

Ans. B

5. A hexadigit can be represented by [IBPS Clerk 2012]

(1) three binary (consecutive) bits

(2) four binary (consecutive) bits

(3) eight binary (consecutive) bits

(4) sixteen binary (consecutive) bits

(5) None of the above

Ans. 4

6. What type of information system would be recognised by digital circuits?

(1) Hexadecimal system

(2) Binary system

(3) Both ‘1’ and ‘2’

(4) Only roman system

Ans. 3

7. The binary equivalent of decimal number 98 is [IBPS Clerk 2012]

(1) 1110001

(2) 1110100

(3) 1100010

(4) 1111001

(5) None of these

Ans. 3

8. What is the value of the binary number 101?

(1) 3

(2) 5

(3) 6

(4) 101

Ans. 2

9. The binary number 10101 is equivalent to decimal number ………….

(1) 19

(2) 12 (

3) 27

(4) 21

Ans. 4

10. To convert binary number to decimal, multiply the all binary digits by power of

(1) 0

(2) 2

(3) 4

(4) 6

Ans. 2

11. Which of the following is a hexadecimal number equal to 3431 octal number?

(1) 197

(2) 917

(3) 791

(4) 971

(5) 719

Ans. 5

12. LSD stands for

(1) Long Significant Digit

(2) Least Significant Digit

(3) Large Significant Digit

(4) Longer Significant Decimal

Ans. 2

13. How many values can be represented by a single byte?

(1) 4

(2) 16

(3) 64

(4) 256

Ans. 4

14. Which of the following is not a computer code?

(1) EBCDIC

(2) ASCII

(3) CISC

(4) UNICODE

Ans. 3

15. MSD refers as

(1) Most Significant Digit

(2) Many Significant Digit

(3) Multiple Significant Digit

(4) Most Significant Decimal

Ans. 1

16. The most widely used code that represents each character as a unique 8-bit code is [IBPS Clerk 2011]

(1) ASCII

(2) UNICODE

(3) BCD

(4) EBCDIC

(5) None of these

Ans. 1

17. Today’s mostly used coding system is/are

(1) ASCII

(2) EBCDIC

(3) BCD

(4) Both ‘1’ and ‘2’

Ans. 4

18. In EBCDIC code, maximum possible characters set size is

(1) 356

(2) 756

(3) 556

(4) 256

Ans. 4

19. Code ‘EBCDIC’ that is used in computing stands for

(1) Extension BCD Information Code

(2) Extended BCD Information Code

(3) Extension BCD Interchange Conduct

(4) Extended BCD Interchange Conduct

Ans. 2

20. Most commonly used codes for representing bits are

(1) ASCII

(2) BCD

(3) EBCDIC

(4) All of these

Ans. 4

21. The coding system allows non-english characters and special characters to be represented

(1) ASCII

(2) UNICODE

(3) EBCDIC

(4) All of these

Ans. 2

22. Which of the following is invalid hexadecimal number?

(1) A0XB

(2) A0F6

(3) 4568

(4) ACDB

Ans. 1

23. Gate having output 1 only when one of its input is 1 is called

(1) AND

(2) NOT

(3) OR

(4) NOR

Ans. 3

24. Gate is also known as inverter.

(1) OR

(2) NOT

(3) XOR

(4) NAND

Ans. 2

25. The only function of NOT gate is to ……..

(1) Stop signal

(2) Invert input signal

(3) Act as a universal gate

(4) Double input signal

Ans. 2

26. Which of following are known as universal gates?

(1) NAND & NOR

(2) AND & OR

(3) XOR & OR

(4) AND

(5) OR

Ans. 1

27. Gate whose output is 0 only when inputs are different is called

(1) XOR

(2) XNOR

(3) NOR

(4) NAND

Ans. 1

28. In the binary language, each letter of the alphabet, each number and each special character is made up of a unique combination of [BOB Clerk 2010]

a) 8 bytes

b) 8 KB

c) 8 character

d) 8 bits

Ans. D

29. Decimal equivalent of (1111)_{2 }is [IBPS Clerk 2012]

a) 11

b) 10

c) 1

d) 15

e) 13

Ans. D

30. ASCII code for letter A is

a) 1100011

b) 1000001

c) 1111111

d) 0010011

Ans. B

31. Which of the following is not a binary number? [IBPS Clerk 2011]

(1) 001

(2) 101

(3) 202

(4) 110

Ans. 3

32. Which of the following is an example of binary number? [IBPS Clerk 2011]

(1) 6AH1

(2) 100101

(3) 005

(4) ABCD

Ans. 2

33. Numbers that are written with base 10 are classified as

(1) decimal number

(2) whole number

(3) hexadecimal number

(4) exponential integers

Ans. a

34. The octal system [IBPS Clerk 2011]

(1) needs less digits to represent a number than in the binary system

(2) needs more digits to represent a number than in the binary system

(3) needs the same number of digits to represent a number as in the binary system

(4) needs the same number of digits to represent a number as in the decimal system

Ans. 2

35. Hexadecimal number system has ………. base.

(1) 2

(2) 8

(3) 10

(4) 16

Ans. 4

36. ASCII stands for [IBPS Clerk 2011,2014]

(1) American Special Computer for Information Interaction

(2) American Standard Computer for Information Interchange

(3) American Special Code for Information Interchange

(4) American Special Computer for Information Interchange

(5) American Standard Code for Information Interchange

Ans. 5