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

Question # 1

The number A9D in Hexadecimal system is equivalent to which number in decimal system.

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2727

2648

3717

2717

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Question # 2

126₈+ 425₈= __________

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111101011₂

101101001₂

101101011₂

101100011₂

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Question # 3

125₈(octal) in decimal equivalent is equal to.

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83₁₀

84₁₀

85₁₀

86₁₀

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Question # 4

What is the octal equivalent of the binary system :10111101.?

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675₈

275₈

572₈

573₈

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Question # 5

The binary number 10011101 is equal to the hexadecimal number.

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Question # 6

Octal number system uses the digit 0 to 7. The equivalent of Octal 126 in decimal system is.

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Question # 7

Alphanumeric characters are expressed in terms of binary codes. In ASCII (American standard Code for Information Interchange) each character is represented as a

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8 bit code

4 bit code

5 bit code

7 bit code

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Question # 8

AB₁₆+ CD₁₆= ________

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101111010₂

101111000₂

101111110₂

101101000₂

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Question # 9

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 # 10

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

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bit

kilobyte

byte

megabyte

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