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

Question # 1

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 # 2

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

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136₈

140₈

139₈

141₈

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Question # 3

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

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675₈

275₈

572₈

573₈

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Question # 4

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 # 5

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

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Question # 6

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 # 7

The binary number 10011101 is equal to the hexadecimal number.

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Question # 8

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 # 9

Base 8 is often used in computing because.

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there are 8 bit in a byte

calculations become easier by using base 8

electronic circuits can be made econmically

it can represent long strings of binary 1's an 0's in a more compact form

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Question # 10

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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