**Number system in computer MCQ**. Most important Theory Questions and answers for all Competitive Exams. These are theoretical one liner most asked question.

## Number System in Computer MCQ

1. What is the minimum and maximum value in Octal Number System?

a) 1 to 8

b) 0 to 7

c) 2 to 9

d) None of the above

Ans. b

**Values in Different Number System**

**Binary** **2** (0,1)

**Octal ****8** (0,1,2,3,4,5,6,7)

**Decimal** **10** (0,1,2,3,4,5,6,7,8,9)

**Hexadecimal** **16** (0,1,2,3,4,5,6,7,8,9,**A**,**B**,**C**,**D**,**E**,**F**)

2. What number system is not understood by C language compiler directly?

a) Decimal

b) Octal

c) Binary

d) Hex Decimal

Ans. c

**Explanation**: Yes, C language can not understand Binary language directly. Because C language is a High level language

3. Numbers are stored and transmitted inside a computer in which format?

a) binary form

b) ASCII code form

c) decimal form

d) alphanumeric form

Ans. a

4. The value of radix in binary number system is ___

a) 2

b) 8

c) 10

d) 1

Ans. a

**Explanation**: In a binary number system, the value of base or radix is 2. The binary system uses only two digits for the representation of numbers.

5. A computer language that is written in binary codes only is _____

a) machine language

b) C

c) C#

d) Pascal

Ans. a

**Explanation**: Machine Language is written in binary codes only. It can be easily understood by the computer and is very difficult for us to understand. A machine language, unlike other languages, requires no translators or interpreters.

6. A bit in a computer terminology means either 0 or 1.

a) True

b) False

Ans. a

**Explanation**: A bit stands for a binary digit. A binary digit can have only two digits i.e. 0 or 1.

7. Which of the following is not a binary number?

a) 1111

b) 101

c) 11E

d) 000

Ans. c

**Explanation**: Alphabets are only allowed in the hexadecimal number system.

8. One Nibble contain the number of bits equal to

a) 2

b) 4

c) 8

d) 16

Ans. b

9. The String of 8 bits is known as

a) Nibble

b) Byte

c) Octed

d) Quad

Ans. b

10. The 1’s complement of a binary number is obtained by changing

a) Each 1 to 0

b) Each 0 to 1

c) Each 1 to 0 and each 0 to 1

d) None of the above

Ans. c

Binary Number | 1’s Complement |

1111 | 0000 |

0000 | 1111 |

1100 | 0011 |

0011 | 1100 |

1010 | 0101 |