1.2.4 Data Storage - Binary

Which of the following is an 'analogue device'?

• Hard disk drive
• Vinyl record
• Smart phone
• Keyboard

What is this an example of?

• Overflow error
• 8 bit binary addition

Add these two 4 bit binary numbers together.  What is the answer?

• 10101
• 1100
• 00111
• 0101

Which of the following is a 'digital device'?

• Cassette tape
• Vinyl record
• Smartphone
• Temperature thermometer

Define the term 'analogue'.

• Analogue uses continuous data. For example, a clock hand shows the time, with a smoothly moving seconds hand.
• Analogue uses discrete data, which has two states, either on or off.  This is represented by a 1 or a 0.

Define the term 'digital'.

• Digital uses continuous data. For example, a clock hand shows the time, with a smoothly moving seconds hand.
• Digital uses discrete data, which has two states, either on or off.  This is represented by a 1 or a 0.

If you tried to connect an analogue microphone to a computer - an analogue to digital conversion (ADC) would need to take place.  True or False?

• True
• False

Denary is known as ________because there are ten choices of digits between 0 and 9.

• Base 2
• Base 5
• Base 10
• Base 16

Why does data need to be converted into a binary format in order to be processed by computers?

• Computers are digital and only have two states, on and off or true and false.  This is represented in binary by a 1 and a 0.
• It doesn't, computers can read analogue data directly from an input.

Binary is known as _______ because it uses the digits 1 and 0.

• Base 2
• Base 4
• Base 10
• Base 16