Data Representation Quiz

Data Representation Quiz

8th Grade

30 Qs

quiz-placeholder

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Data Representation Quiz

Data Representation Quiz

Assessment

Quiz

Computers

8th Grade

Practice Problem

Hard

Created by

Abby Charles

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30 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the smallest units of data in a computer?

A) Bytes

B) Bits (binary digits)

C) Kilobytes

D) Megabytes

Answer explanation

The smallest units of data in a computer are bits (binary digits), which represent the most basic form of data in computing. Bytes, kilobytes, and megabytes are larger units derived from bits.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many bits are in a byte?

4 bits

8 bits

16 bits

32 bits

Answer explanation

A byte consists of 8 bits. This is a standard measurement in computing, where bits are the smallest unit of data, and 8 bits together form a byte, which can represent 256 different values.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What number system do computers use to store data?

A) Decimal (base 10)

B) Binary (base 2)

C) Hexadecimal (base 16)

D) Octal (base 8)

Answer explanation

Computers use the binary number system (base 2) to store data, as it represents information using only two states: 0 and 1. This is fundamental to digital electronics and computing.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why do computers use binary?

A) Computers use binary because they use electronic circuits that can only be ON or OFF (1s and 0s).

B) Binary is easier to understand.

C) Binary uses fewer digits.

D) Binary is faster to process.

Answer explanation

Computers use binary because their electronic circuits operate in two states: ON and OFF, represented by 1s and 0s. This makes binary the most efficient way for computers to process and store data.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the largest number that can be stored in an 8-bit binary number?

A) 127

B) 255

C) 511

D) 1023

Answer explanation

An 8-bit binary number can represent values from 0 to 255. The maximum value is calculated as 2^8 - 1, which equals 255. Therefore, the largest number that can be stored in an 8-bit binary number is B) 255.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What number system does binary use?

A) Base 10

B) Base 2

C) Base 8

D) Base 16

Answer explanation

Binary uses Base 2, which means it consists of only two digits: 0 and 1. This is different from Base 10 (decimal), Base 8 (octal), and Base 16 (hexadecimal), which use more digits.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many possible values can a single binary digit represent?

One

Two (0 and 1)

Four

Eight

Answer explanation

A single binary digit, or bit, can represent two possible values: 0 and 1. Therefore, the correct answer is 'Two (0 and 1)', as it reflects the fundamental nature of binary representation.

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