Digital Tech - Data Representation Quiz

What is an example of analogue data?

• Binary digits

• Grooves in a vinyl record

• Digital sound files

• Computer code

How do computers represent data?

• As continuous vibrations

• As grooves on a disk

• As a combination of 1 or 0 numbers

• As sound waves

What is the process called that converts analogue sound to digital data?

• Encoding

• Sampling

• Decoding

• Transmitting

Which of the following is NOT an example of analogue data?

• Sound waves

• Grooves on vinyl records

• Binary digits

• Acoustic instrument sounds

What does the blue line represent in the graph?

• Digital samples

• Analogue sound wave

• Sampling frequency

• Compressed data

What is the typical sampling frequency used on most audio CDs?

• 22,000 times per second

• 33,000 times per second

• 44,000 times per second

• 55,000 times per second

What happens to audio files when they are compressed?

• Data is added to increase the size

• Data is removed to reduce the size

• Sampling frequency is increased

• Analogue data is converted to digital

Which of the following is NOT an example of analogue data?

• Vibrations

• Voltage

• Rotations

• Binary code

What is the relationship between sampling frequency and sound quality?

• Higher sampling frequency results in lower sound quality

• Higher sampling frequency results in better sound quality

• Sampling frequency does not affect sound quality

• Lower sampling frequency results in better sound quality

Which of the following is an example of a non-electrical analogue device?

• Analogue synthesiser

• Digital clock

• Analogue clock

• Digital TV