GCSE Computer Science Revision - Data Representation Quiz

What is the binary representation of the decimal number 13?

• 1101

• 1011

• 1110

• 1001

How many bits are in a hexadecimal digit?

• 2

• 4

• 8

• 16

Which of the following is NOT a method of data compression?

• Lossless Compression

• Lossy Compression

• Encryption Compression

• Run-Length Encoding

What is the primary purpose of data encryption?

• To compress data to save storage space

• To convert data into a secret code for security

• To convert data into binary form for transmission

• To increase the speed of data transmission

What is the hexadecimal notation for the binary number 1010 1101?

• 9D

• AD

• BD

• AE

In the context of data transmission, what does the term "bandwidth" refer to?

• The amount of data that can be stored on a device

• The maximum transmission capacity of a device

• The security protocol used during data transmission

• The compression ratio achieved during data transmission

Which of the following is an example of lossy compression?

• ZIP

• JPEG

• PNG

• FLAC

Which of the following best describes the process of converting plaintext into ciphertext?

• Data Compression

• Data Encryption

• Data Transmission

• Data Representation

How is sound represented in digital form?

• By converting analog sound waves into binary numbers

• By converting analog sound waves into shapes

• By converting analog sound waves into colors

• By converting analog sound waves into letters

What is the unit used to measure the frequency of sound waves?

• Miles per hour (mph)

• Kilograms (kg)

• Degrees Celsius (°C)

• Hertz (Hz)