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 |