Hexadecimal Numbers: Interactive Quizzes and Practice Questions

Question 1

Identify the hexadecimal representation of the ASCII code for the letter 'A'.

Accepted Answer

41

Answer

40

Answer

42

Answer

43

Question 2

Identify the hexadecimal equivalent of the MAC address 00:11:22:33:44:55.

Accepted Answer

001122334455

Answer

112233445500

Answer

00112233445511

Answer

11223344550011

Question 3

Perform hexadecimal addition: Add 1A and 2B.

Accepted Answer

5F

Answer

35

Answer

45

Answer

65

Question 4

Identify the largest among the hexadecimal numbers A5, B7, C9, and DE.

Accepted Answer

DE

Answer

A5

Answer

B7

Answer

C9

Question 5

What is the base or radix of the hexadecimal number system?

Accepted Answer

16

Answer

8

Answer

10

Answer

20

Question 6

Which of the following is **not** a valid hexadecimal digit?

Accepted Answer

G

Answer

0

Answer

9

Answer

A

Question 7

Perform the following hexadecimal addition: 15 + 2A.

Accepted Answer

4D

Answer

3F

Answer

5B

Answer

69

Question 8

Which operator is used to perform hexadecimal addition?

Accepted Answer

+

Answer

-

Answer

*

Answer

/

Question 9

Which syntax is used to represent hexadecimal numbers in Python?

Accepted Answer

0x

Answer

0X

Answer

h

Answer

H

Question 10

Explain the primary purpose of using hexadecimal numbers in computer science.

Accepted Answer

To simplify binary calculations.

Answer

To represent large numbers efficiently.

Answer

To represent colours in web design.

Answer

To store data in a human-readable format.

Question 11

Which of the following is an invalid hexadecimal digit?

Accepted Answer

S

Answer

0

Answer

9

Answer

E

Question 12

Which of the following hexadecimal numbers is the largest?

Accepted Answer

3A

Answer

2E

Answer

35

Answer

1F

Question 13

Find the hexadecimal representation of the IP address 192.168.1.1.

Accepted Answer

C0A80101

Answer

192.168.1.1

Answer

C0.A8.01.01

Answer

10101000.10101000.00000001.00000001

Question 14

What is the hexadecimal representation of the decimal number 255?

Accepted Answer

FF

Answer

100

Answer

1FF

Question 15

Which of the following hexadecimal numbers is equal to the decimal number 255?

Accepted Answer

FF

Answer

FE

Answer

100

Answer

111

Question 16

Which of the following is NOT a characteristic of hexadecimal numbers?

Accepted Answer

Base 10

Answer

Uses digits 0-9 and A-F

Answer

Concise representation

Answer

Used in computer science

Question 17

Convert the binary number 11111111 to its hexadecimal equivalent.

Accepted Answer

FF

Answer

FE

Answer

1FF

Answer

100

Question 18

Convert the decimal number 255 to hexadecimal.

Accepted Answer

FF

Answer

100

Answer

255

Answer

11111111

Question 19

Find the decimal equivalent of the hexadecimal number A3.

Accepted Answer

103

Answer

163

Answer

253

Answer

161

Question 20

Determine the range of values representable by a 4-bit hexadecimal number.

Accepted Answer

0 to 15

Answer

0 to 255

Answer

16 to 255

Answer

0 to 65,535

Question 21

Which of the following is NOT a valid hexadecimal digit?

Accepted Answer

G

Answer

0

Answer

9

Answer

A

Question 22

Which of the following is the hexadecimal representation of the decimal number 15?

Accepted Answer

E

Answer

F

Answer

15

Answer

1E

Question 23

What is the hexadecimal equivalent of the binary number 1111?

Accepted Answer

F

Answer

E

Answer

1E

Answer

1F

Question 24

Which of the following is used to represent hexadecimal numbers in C programming language?

Accepted Answer

0x prefix

Answer

0h prefix

Answer

0b prefix

Answer

0d prefix

Question 25

Which of the following is NOT a valid hexadecimal digit?

Accepted Answer

G

Answer

0

Answer

9

Answer

A

Question 26

Convert the decimal number 255 to hexadecimal.

Accepted Answer

FF

Answer

100

Answer

255

Answer

1FF

Question 27

Which of the following hexadecimal numbers is equivalent to the decimal number 1023?

Accepted Answer

3FF

Answer

1023

Answer

255

Answer

400

Question 28

Which of the following is the hexadecimal representation of the binary number 11111111?

Accepted Answer

FF

Answer

127

Answer

255

Answer

111

Question 29

In hexadecimal, the number 10 is equivalent to which decimal number?

Accepted Answer

10

Answer

8

Answer

16

Answer

256

Question 30

What is the hexadecimal representation of the ASCII character 'A'?

Accepted Answer

41

Answer

61

Answer

1A

Answer

A1

Question 31

Which of the following is NOT a valid hexadecimal digit?

Accepted Answer

G

Answer

C

Answer

F

Answer

A

Question 32

Convert the decimal number 255 to hexadecimal.

Accepted Answer

FF

Answer

EE

Answer

DD

Answer

AA

Question 33

Which of the following is a common use of hexadecimal numbers?

Accepted Answer

Representing computer memory addresses

Answer

Calculating percentages

Answer

Storing text data

Answer

Measuring time in seconds

Question 34

What is a limitation of the hexadecimal number system?

Accepted Answer

It has a limited range of digits (0-F).

Answer

It is widely used in computing.

Answer

It is suitable for representing large numbers.

Answer

It is easy to read and write.

Question 35

Convert the decimal number 255 to hexadecimal.

Accepted Answer

FF

Answer

FE

Answer

EF

Question 36

Which of the following is NOT a valid hexadecimal digit?

Accepted Answer

G

Answer

A

Answer

F

Answer

E

Question 37

How many bits are needed to represent a single hexadecimal digit?

Accepted Answer

4

Answer

8

Answer

2

Answer

16

Question 38

What is the binary equivalent of the hexadecimal number 7A?

Accepted Answer

01111010

Answer

11101101

Answer

11110110

Answer

01110101

Question 39

Hexadecimal numbers are commonly used in computing for which of the following purposes?

Accepted Answer

Representing memory addresses

Answer

Storing text data

Answer

Encoding images

Answer

Transmitting audio signals

Question 40

What is the decimal equivalent of the hexadecimal number 'A5'?

Accepted Answer

165

Answer

105

Answer

205

Answer

155

Question 41

Which hexadecimal number represents the decimal number 250?

Accepted Answer

FA

Answer

1FA

Answer

9A

Answer

F5

Question 42

What is the result of adding the hexadecimal numbers '3B' and '2F'?

Accepted Answer

6A

Answer

6E

Answer

5A

Answer

70

Question 43

What is the largest single-digit value that can be represented in hexadecimal?

Accepted Answer

F

Answer

10

Answer

Z

Answer

E

Question 44

Why is hexadecimal widely used in computer science?

Accepted Answer

It provides a compact way to represent binary data.

Answer

It allows for representing larger numbers than decimal.

Answer

It is easier for humans to perform calculations with than binary.

Question 45

Which of these is NOT a valid hexadecimal number?

Accepted Answer

G3H

Answer

2CD

Answer

A1F

Question 46

If a byte of data can store values from 0 to 255, how many hexadecimal digits are needed to represent all possible values?

Accepted Answer

2

Answer

8

Answer

1

Answer

4

Question 47

The hexadecimal number '7F' represents a specific bit pattern. What is the decimal equivalent of this bit pattern?

Accepted Answer

127

Answer

128

Answer

255

Answer

191

Question 48

Why is hexadecimal preferred over decimal when representing memory addresses in computers?

Accepted Answer

It simplifies representing memory addresses aligned with byte boundaries.

Answer

It reduces the amount of memory required to store addresses.

Answer

It makes arithmetic operations on memory addresses easier.