Data Representation Quizzes: Test Your Understanding of Data Formats

Question 1

What is an advantage of hexadecimal code compared to ASCII code?

Accepted Answer

It is more compact.

Answer

It is easier to read.

Answer

It supports a wider range of characters.

Answer

It is more secure.

Question 2

Which is not a valid ASCII character code?

Accepted Answer

200

Answer

65

Answer

128

Answer

10

Question 3

What is the binary representation of the hexadecimal number 'F'?

Accepted Answer

1111

Answer

0111

Answer

1010

Answer

0011

Question 4

Which method is used to represent numbers inside computers?

Accepted Answer

Binary digits

Answer

Analogue signals

Answer

Sound waves

Answer

Morse code

Question 5

What is the primary purpose of data representation in ICT?

Accepted Answer

Storing and processing data in a computer-understandable format.

Answer

Making data more accessible to humans.

Answer

Reducing data storage space.

Answer

Improving data transfer speed.

Question 6

What is the ASCII code for the lowercase letter 'c'?

Accepted Answer

97

Answer

98

Answer

100

Answer

101

Question 7

Which of the following is a binary number, composed entirely of 0s and 1s?

Accepted Answer

101101

Answer

ABCDE

Answer

12345

Answer

Hello

Question 8

Which of the following is NOT a feature of binary representation, which uses only 0s and 1s?

Accepted Answer

Can represent decimal fractions with ease

Answer

Uses only 0s and 1s

Answer

Can efficiently represent very large numbers

Answer

Forms the basis for computer operations

Question 9

What is the primary function of a parity bit, which is an additional bit added to data?

Accepted Answer

Detecting errors in data transmission

Answer

Increasing the total number of bits in a data block

Answer

Speeding up data transfer rates

Answer

Encrypting data for secure transmission

Question 10

Determine the binary representation of the decimal number 13.

Accepted Answer

1101

Answer

1100

Answer

1110

Answer

1111

Question 11

What is the ASCII code for the lowercase letter 'a'?

Accepted Answer

97

Answer

61

Answer

65

Answer

72

Question 12

Select the appropriate method to convert the binary number 101011 to decimal:

Accepted Answer

Multiply each bit by its weight (2^n) starting from the right, then add the results

Answer

Multiply each bit by its weight (2^n) starting from the left, then add the results

Answer

Treat the number as a base-2 number and convert it using the place-value system

Answer

Use a binary-to-decimal conversion table

Question 13

Identify the correct method to convert the hexadecimal number 2A to binary:

Accepted Answer

Convert each hexadecimal digit to its 4-bit binary equivalent and concatenate the results

Answer

Find the binary representation of the decimal equivalent of 2A and convert to hexadecimal

Answer

Use a hexadecimal-to-binary conversion table

Answer

Convert each hexadecimal digit to its ASCII code and concatenate the results

Question 14

Determine the hexadecimal equivalent of the binary number 1111111111111111:

Accepted Answer

FFFF

Answer

EEEE

Answer

DDDD

Answer

CCCC

Question 15

Select the true statement regarding data representation:

Accepted Answer

Data can be represented in various ways depending on its purpose and context

Answer

There is a single 'correct' way to represent data

Answer

Data representation methods are always universal and work identically across all applications

Answer

Data representation is insignificant in computing

Question 16

Which ASCII code represents the uppercase letter 'A'?

Accepted Answer

65

Answer

72

Answer

80

Answer

97

Question 17

How many bits are used to represent a single ASCII character?

Accepted Answer

8

Answer

5

Answer

7

Answer

16

Question 18

What is the fundamental unit of data representation in a computer system?

Accepted Answer

Bit

Answer

Byte

Answer

Kilobyte

Answer

Megabyte

Question 19

What is the ASCII code representing the letter 'A'?

Accepted Answer

65

Answer

75

Answer

85

Answer

95

Question 20

Which data type is appropriate for storing whole numbers without decimal points?

Accepted Answer

Integer

Answer

Float

Answer

String

Answer

Boolean

Question 21

What is the primary function of a checksum?

Accepted Answer

Detecting errors in data transmissions

Answer

Compressing data

Answer

Encrypting data

Answer

Converting data between formats

Question 22

Which of the following is not a lossless data compression technique?

Accepted Answer

JPEG

Answer

Huffman Coding

Answer

Run-Length Encoding

Answer

PNG

Question 23

How do signed and unsigned binary numbers differ?

Accepted Answer

Signed numbers can represent negative values, unlike unsigned numbers

Answer

Unsigned numbers can represent larger values than signed numbers

Answer

Signed numbers use 2's complement representation, while unsigned numbers use 1's complement

Answer

There is no difference between signed and unsigned binary numbers

Question 24

What is the primary use of a parity bit?

Accepted Answer

Detecting errors in data transmission

Answer

Correcting errors in data transmission

Answer

Converting data between formats

Answer

Compressing data

Question 25

What disadvantage is associated with using hexadecimal representation over binary representation?

Accepted Answer

Hexadecimal numbers are more challenging to read and write

Answer

Hexadecimal numbers require more bits to represent the same value

Answer

Hexadecimal numbers are less accurate than binary numbers

Answer

There are no disadvantages to using hexadecimal over binary

Question 26

How many bits are required to represent the letter 'A' in ASCII code?

Accepted Answer

8

Answer

6

Answer

7

Answer

9

Question 27

Which data type requires 8 bits to represent a value?

Accepted Answer

Byte

Answer

Integer

Answer

Float

Answer

Double

Question 28

What is the primary purpose of a parity bit?

Accepted Answer

To detect errors in data transmission

Answer

To store additional data

Answer

To improve data processing speed

Answer

To convert data between formats

Question 29

Which ASCII code represents the uppercase letter 'A'?

Accepted Answer

01100001

Answer

00000001

Answer

01100010

Answer

11000001

Question 30

Convert the decimal number 25 to binary.

Accepted Answer

11001

Answer

10100

Answer

10011

Answer

01101

Question 31

What is the ASCII code for the uppercase letter 'Z' in hexadecimal?

Accepted Answer

5A

Answer

41

Answer

63

Answer

7F

Question 32

Convert the binary number 10101101 to hexadecimal.

Accepted Answer

A5

Answer

5A

Answer

A4

Answer

59

Question 33

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

Accepted Answer

They can represent both positive and negative numbers

Answer

They use 16 symbols

Answer

They are often used to represent large numbers

Answer

They are commonly used in computer programming

Question 34

What is the decimal equivalent of the binary number 11111111?

Accepted Answer

255

Answer

127

Answer

511

Answer

767

Question 35

In computing, the fundamental unit of data is the:

Accepted Answer

Bit

Answer

Byte

Answer

Nibble

Answer

Word

Question 36

The hexadecimal number system has a base value of:

Accepted Answer

16

Answer

2

Answer

8

Answer

10

Question 37

An invalid hexadecimal digit is:

Accepted Answer

J

Answer

A

Answer

9

Answer

F

Question 38

Which ASCII code represents the uppercase letter 'A'?

Accepted Answer

65

Answer

66

Answer

67

Answer

64

Question 39

Which of the following data representation formats is primarily used for storing text?

Accepted Answer

ASCII

Answer

Binary

Answer

Unicode

Answer

Hexadecimal

Question 40

What is the primary purpose of data representation?

Accepted Answer

Storing and manipulating data in computer systems

Answer

Transmitting data over networks

Answer

Displaying data on screens

Answer

Encrypting data for security

Question 41

Which of the following is the ASCII code for the letter 'A'?

Accepted Answer

65

Answer

70

Answer

97

Answer

48

Question 42

What is the purpose of using two's complement notation?

Accepted Answer

To represent negative numbers in binary

Answer

To increase the number of positive numbers that can be represented

Answer

To conserve memory space

Answer

To simplify binary operations

Question 43

Which of the following is NOT a characteristic of ASCII codes?

Accepted Answer

They are variable-length codes.

Answer

They are based on the English alphabet.

Answer

They are widely used in computing systems.

Answer

They are used to represent both letters and numbers.

Question 44

What is the ASCII code for the character 'A'?

Accepted Answer

65

Answer

66

Answer

97

Question 45

Which of the following best describes the purpose of ASCII?

Accepted Answer

To represent characters using numerical codes.

Answer

To convert binary numbers to decimal.

Answer

To compress data for efficient storage.

Answer

To store data in hexadecimal format.

Question 46

Which data representation format is commonly used for representing colours on a computer screen?

Accepted Answer

RGB

Answer

ASCII

Answer

Binary

Question 47

How many bits are required to represent a single character using the ASCII standard?

Accepted Answer

7

Answer

8

Answer

32

Answer

16

Question 48

A computer uses binary representation because:

Accepted Answer

Electronic circuits can easily represent two states: on and off.

Answer

It is a more efficient way to store data than decimal.

Answer

It is the only way to represent data in a computer.