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ECAT Computer Science Chapter 4 Computer Arithmetic & Number System Online Test MCQs With Answers

Question # 1

97₁₀(decimal) in octal number system is equivalent to.

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136₈

140₈

139₈

141₈

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Question # 2

The digits used for hexadecimal number system are.

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A through Z

1 through 16

0 through 15

0 through 9 and A through F

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Question # 3

Data is represented on a computer by means of a two-state on/off system called

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the octal system

the binary system

a word

ROM

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Question # 4

125₈(octal) in decimal equivalent is equal to.

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83₁₀

84₁₀

85₁₀

86₁₀

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Question # 5

The hexadecimal number system is widely used in analyzing and programming in.

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analog computers

binary computers

decimal computers

micro computers

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Question # 6

The binary number 101000101011 is equal to the hexadecimal number

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A2D

C2D

A2B

B2C

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Question # 7

The main advantage of hexadecimal number is the case of conversion from hexadecimal to.

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ASCII code

binary

octal

decimal

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Question # 8

Number 375₁₀is equivalent in binary system to.

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101110101

100110101

101110111

101110011

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Question # 9

126₈+ 425₈= __________

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111101011₂

101101001₂

101101011₂

101100011₂

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Question # 10

A letter, number, or a special character is represented by a.

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bit

kilobyte

byte

megabyte

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