WJEC GCSE DigiTech 1.1.1.1 - Analogue and Digital Data

What is an example of analogue data?

• Sound waves

• Binary digits

• Digital files

• Sampling frequency

How do computers store sound digitally?

• By varying the amplitude

• By using continuous vibrations

• Through analogue circuits

• Using a process called sampling

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

• 88 kHz

• 44 kHz

• 22 kHz

• 96 kHz

Which device is an example of an analogue device?

• Smartphone

• Memory stick

• Analogue synthesiser

• Digital camera

What is a disadvantage of digital data?

• Higher quality of sound

• Requires more physical space

• No loss of data quality

• Can be less accurate due to data sampling

What does analogue data typically store?

• Compressed files

• Binary digits

• Continuous data

• Digital samples

Which method is used to store sound in vinyl records?

• Digital sampling

• Binary encoding

• Continuous vibrations

• Frequency modulation

What is true about analogue data?

• It is stored as binary digits

• It can decline when copied due to corruption

• It is always digital

• It is less accurate than digital data

Which is a non-electrical analogue device?

• Analogue computer

• Sundial

• Electronic synthesizer

• Digital watch

What happens when audio files are compressed?

• Data is removed to reduce size

• Data is added to increase size

• Sampling frequency is increased

• Data quality improves