Computer Systems Quiz

Computer Systems Quiz

10th Grade

40 Qs

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Computer Systems Quiz

Computer Systems Quiz

Assessment

Quiz

Computers

10th Grade

Practice Problem

Medium

Created by

C Dunn

Used 1+ times

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40 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which number system do computers utilise?

Decimal

Octal

Binary

Hexadecimal

Answer explanation

Computers use the binary number system, which consists of only two digits: 0 and 1. This system is fundamental for digital electronics and data processing, making it the correct choice over decimal, octal, and hexadecimal.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the binary equivalent of the decimal number 9?

00001000

00001001

00001010

00001100

Answer explanation

The decimal number 9 converts to binary as follows: 9 divided by 2 gives a quotient of 4 and a remainder of 1. Continuing this process, we get 1001 in binary. Thus, the correct answer is 1001.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does each digit in a binary number represent?

Byte

Bit

Nibble

Word

Answer explanation

In a binary number, each digit is called a 'bit'. A bit can be either 0 or 1, representing the smallest unit of data in computing. Other terms like byte, nibble, and word refer to larger groups of bits.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the decimal value of the binary number 10001011?

139

138

140

137

Answer explanation

To convert the binary number 10001011 to decimal, calculate: 1*2^7 + 0*2^6 + 0*2^5 + 0*2^4 + 1*2^3 + 0*2^2 + 1*2^1 + 1*2^0 = 128 + 0 + 0 + 0 + 8 + 0 + 2 + 1 = 139. Thus, the correct answer is 139.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the binary representation of the decimal number 173?

10101101

11010101

10111001

10011011

Answer explanation

To convert 173 to binary, divide by 2 and record remainders: 173/2=86 R1, 86/2=43 R0, 43/2=21 R1, 21/2=10 R1, 10/2=5 R0, 5/2=2 R1, 2/2=1 R0, 1/2=0 R1. Reading remainders from bottom to top gives 10101101.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is floating point representation used for?

Whole numbers

Characters

Real numbers

Images

Answer explanation

Floating point representation is used to store real numbers, which include fractions and decimals. Unlike whole numbers, it allows for a wide range of values and precision, making it essential for scientific calculations and graphics.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In floating point representation, what is the mantissa?

The exponent value

The whole number part

The fractional part

The base

Answer explanation

In floating point representation, the mantissa refers to the fractional part of the number. It represents the significant digits of the value, while the exponent indicates the scale. Thus, the correct answer is 'The fractional part'.

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