Digital and Analogue

What is the difference between analogue and digital data?

• Analogue is continuous data, whereas digital signals have two values, 0 and 1.
• Analogue has two values 0 and 1, whereas digital is continuous data.

Why do memory SD cards get lighter as data is loaded on to them?

• Data increases the weight of the card due to storage materials.
• Memory SD cards do not get lighter; this is a misconception.
• An electron is lost each time a 0 is converted to a 1

An analogue signal can have any value

• True

• False

What number is this: 01010

• 100

• 10

• 9

• 8

How many bits are in 1 byte? 

• 5

• 6

• 7

• 8

Digital signals are made up of 1s and 0s

• True

• False

How many bytes are in 1 megabyte (1MB)

• 1000 bytes

• 100,000 bytes

• 1,000,000 bytes

• 1,000,000,000 bytes

A seismograph (measuring earth tremors) records an analogue signal

• True

• False

An LP is an example of devise that stores analogue signals

• True

• False

A continuous sound signal

• Analogue
• Digital