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

Question # 1

Binary number 10101101 is equivalent in decimal form to.

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170

171

173

174

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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

Four-digit binary number 1011 is represented in the decimal system by.

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Question # 4

The binary number 10011101 is equal to the hexadecimal number.

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Question # 5

Number 375₁₀is equivalent in binary system to.

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101110101

100110101

101110111

101110011

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Question # 6

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

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bit

kilobyte

byte

megabyte

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Question # 7

The reason why computers have been designed to use binary numbers is.

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computer circuits have to handle 2 binary digits rather than 10

electronic components, by their very nature, operate in a binary mode

everything that can be done with a base of 10 can also be done in binary

all of the above

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Question # 8

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 # 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

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

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101010111101

101010011101

101110011101

101010011111

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