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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

Number 375₁₀is equivalent in binary system to.

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101110101

100110101

101110111

101110011

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Question # 3

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 # 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

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 # 6

The number 10000 would appear just immediately after.

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FFFF (hex)

1111 (binary)

7777 (octal)

all of the above

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Question # 7

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

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A x 100 + B x 10 + C x 1

10 x 100 + 11 x 10 + 12

10 x 16 + 11 x 16 + 12

10 x 256 + 11 x 16 + 12

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Question # 8

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

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bit

kilobyte

byte

megabyte

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Question # 9

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 # 10

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

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