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Number System MCQs with Answers

Number System MCQs

Welcome to the Number System MCQs with Answers. In this post, we have shared Number System Online Test for different competitive exams. Each question in Aptitude Test offers a chance to enhance your knowledge regarding Number System MCQs.

What is the base of the binary number system?
a) 2
b) 8
c) 10
d) 16

Answer
a) 2

In the hexadecimal number system, what is the value of the digit ‘A’?
a) 10
b) 11
c) 12
d) 15

Answer
a) 10

Convert the binary number 1010 to decimal.
a) 8
b) 10
c) 12
d) 14

Answer
b) 10

What is the hexadecimal representation of the decimal number 255?
a) FF
b) FE
c) FE
d) F0

Answer
a) FF

Which of the following is not a valid binary digit?
a) 0
b) 1
c) 2
d) None

Answer
c) 2

What is the base of the octal number system?
a) 2
b) 8
c) 10
d) 16

Answer
b) 8

Convert the decimal number 13 to binary.
a) 1100
b) 1010
c) 1110
d) 1001

Answer
d) 1001

In the base-5 number system, what is the highest digit?
a) 3
b) 4
c) 5
d) 6

Answer
b) 4

What is the binary equivalent of the hexadecimal number 7E?
a) 1111110
b) 0111110
c) 1001110
d) 10011101

Answer
a) 1111110

What is the decimal value of the binary number 1101?
a) 13
b) 14
c) 15
d) 16

Answer
a) 13

Convert the binary number 1001 to octal.
a) 11
b) 21
c) 10
d) 12

Answer
b) 11

What is the result of adding the binary numbers 1101 and 1011?
a) 11000
b) 10100
c) 10000
d) 10010

Answer
d) 10010

In which number system is the number 1011 equivalent to decimal 11?
a) Binary
b) Octal
c) Decimal
d) Hexadecimal

Answer
b) Octal

What is the base of the decimal number system?
a) 2
b) 8
c) 10
d) 16

Answer
c) 10

Convert the octal number 17 to decimal.
a) 15
b) 16
c) 17
d) 18

Answer
a) 15

What is the hexadecimal equivalent of the binary number 1111?
a) F
b) E
c) D
d) C

Answer
a) F

How many digits are there in the octal number system?
a) 8
b) 10
c) 16
d) 2

Answer
a) 8

What is the result of the binary subtraction 1010 – 0110?
a) 0100
b) 0110
c) 1000
d) 1110

Answer
a) 0100

Convert the hexadecimal number 2F to binary.
a) 00101111
b) 11101111
c) 01011111
d) 10011111

Answer
a) 00101111

What is the decimal equivalent of the octal number 52?
a) 42
b) 50
c) 52
d) 40

Answer
a) 42

What is the value of the digit ‘B’ in the hexadecimal system?
a) 11
b) 12
c) 13
d) 14

Answer
a) 11

Convert the decimal number 255 to binary.
a) 11111111
b) 11110000
c) 10000000
d) 11111000

Answer
a) 11111111

What is the octal representation of the binary number 100110?
a) 26
b) 32
c) 45
d) 50

Answer
a) 26

In the decimal number system, what is the equivalent of 1 in hexadecimal?
a) 1
b) A
c) 10
d) 11

Answer
a) 1

Convert the hexadecimal number 3E to decimal.
a) 62
b) 64
c) 58
d) 60

Answer
a) 62

Which of the following is a valid digit in hexadecimal but not in decimal?
a) A
b) B
c) 9
d) 5

Answer
a) A

What is the result of converting the binary number 10101 to decimal?
a) 21
b) 23
c) 25
d) 27

Answer
a) 21

How many bits are in one byte?
a) 4
b) 8
c) 16
d) 32

Answer
b) 8

Convert the octal number 25 to binary.
a) 10101
b) 100101
c) 10110
d) 11001

Answer
b) 100101

What is the value of the binary number 100000 in decimal?
a) 32
b) 64
c) 128
d) 16

Answer
a) 32

What is the hexadecimal representation of the binary number 11100000?
a) E0
b) F0
c) C0
d) D0

Answer
a) E0

Convert the decimal number 9 to binary.
a) 1001
b) 1101
c) 1010
d) 0110

Answer
a) 1001

What is the result of adding the octal numbers 17 and 23?
a) 42
b) 30
c) 40
d) 50

Answer
a) 42

In the binary number system, what is the result of the multiplication 101 × 11?
a) 1111
b) 10001
c) 10010
d) 10111

Answer
b) 10001

Convert the hexadecimal number A1 to binary.
a) 10100001
b) 10100010
c) 10011001
d) 11001000

Answer
a) 10100001

What is the binary equivalent of the decimal number 18?
a) 10010
b) 10101
c) 11010
d) 10011

Answer
a) 10010

Convert the binary number 111 to octal.
a) 7
b) 10
c) 14
d) 15

Answer
a) 7

What is the decimal value of the hexadecimal number 1F?
a) 31
b) 32
c) 30
d) 29

Answer
a) 31

What is the result of the binary addition 1110 + 0011?
a) 10001
b) 11001
c) 1111
d) 10000

Answer
d) 10000

Convert the decimal number 32 to octal.
a) 40
b) 32
c) 20
d) 22

Answer
a) 40

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