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

Question # 1

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 # 2

126₈+ 425₈= __________

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111101011₂

101101001₂

101101011₂

101100011₂

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Question # 3

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 # 4

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 # 5

Number 375₁₀is equivalent in binary system to.

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101110101

100110101

101110111

101110011

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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 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

Data items are generally classified into which type of codes

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Numeric

Alphanumeric

Character

All of the above

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Question # 9

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

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bit

kilobyte

byte

megabyte

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Question # 10

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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