WJEC GCSE DigiTech Unit 1.1.3 Data Storage

What is the binary number system used by computers?

• A system that uses only the digits 1 and 0

• A system that uses the digits 0 to 9

• A system that uses letters and numbers

• A system that uses only the digit 1

What is a bit in terms of data storage?

• 0 or 1

• 4 bits

• 8 bits

• 1,000 bytes

How many bits are in a nibble?

• 2 bits

• 4 bits

• 8 bits

• 16 bits

Which unit comes after a kilobyte (KB) in the order of data storage?

• Byte

• Megabyte (MB)

• Gigabyte (GB)

• Terabyte (TB)

What is the formula for calculating the size of a sound file?

• sample rate x duration x bit depth

• colour depth x image height x image width

• bits per character x number of characters

• sample rate + duration + bit depth

How many bytes are in a kilobyte (KB) according to the table?

• 100 bytes

• 1,000 bytes

• 1,024 bytes

• 10,000 bytes

What is the formula for calculating the size of an image file?

• sample rate x duration x bit depth

• colour depth x image height x image width

• bits per character x number of characters

• image height + image width + colour depth

If a document consists of 56 characters and each character uses 8 bits, what is the total file size in bits?

• 56 bits

• 448 bits

• 400 bits

• 8 bits

What is the next unit after a terabyte (TB) in the order of data storage?

• Megabyte (MB)

• Petabyte (PB)

• Gigabyte (GB)

• Byte

Why do computers use bits to process information?

• Because bits are faster to type

• Because all data must be converted into binary for computers to process

• Because bits are easier to remember

• Because bits are larger than bytes