GCSE Computer Science - Unit Sizes

Put the following unit sizes into order from smallest to largest.

• bit

• nibble

• byte

• kilobyte

• megabyte

Everything in a computer is stored is binary.

• True

• False

Bit is short for ​ (a)   ​ (b)   and is the ​ (c)   unit size used in computing.

A single ​ (d)   can either store a ​ (e)   or a 1.

• Binary
• Digit
• smallest
• largest
• most uncommon
• 0
• bit
• byte

1 byte is the same as _ bits.

Put these unit sizes into order from smallest to largest.

• byte

• kilobyte

• megabyte

• terabyte

• petabyte

Match these with their equivalents.

• 1 megabyte

• 1,000 bytes

• 1 gigabyte

• 8,000,000 bits

• 1 kilobyte

• 16 bits

• 2 bytes

• 1,000,000 kilobytes

• 1 byte

• 2 nibbles

A musician has a 1 TB hard disk drive. The music they record takes up 10 MB per minute.

Assuming nothing else is stored on the hard drive, they could store ​ (a)   minutes of music.

• 100,000
• 1,000
• 10,000,000
• 80,000
• 800,000

Computers are made of billions of ​ (a)   , which have two states (​ (b)   and on).

These can represent the ​ (c)   values used in ​ (d)   (0 and ​ (e)   )

• transistors
• off
• two
• binary
• 1
• 0
• false
• wires
• multiple
• denary

A normal DVD holds 4.7 GB. A university pupil has recorded 10 hours of video footage for a project. The footage takes up 20 MB per minute.

The pupil will need a minimum of _ DVDs to store the footage they have made.

Match the following with their equivalent.

• 1 megabyte

• 500 kilobytes

• 32 bits

• 1,000,000 bytes

• 1 gigabyte

• 8,000 bits

• 0.5 megabytes

• 8 nibbles

• 1 kilobyte

• 8 billion bits