Data Representation - Aqa (GCSE Computing)

The following is a GCSE Computing test covering 'Data Representation - Aqa'

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What is the 8-bit sign-and-magnitude representation of -6?

How many bits does standard ASCII use to encode characters (original ASCII specification)?

Which file format is typically associated with lossy image compression?

What is a key advantage of Unicode over ASCII?

Why do computers use binary representation internally?

What is the uncompressed file size in bytes of an 800 x 600 image with 24-bit colour (no metadata or compression)?

What is the decimal value of hexadecimal A?

What is the effect of a left bitwise shift by one position on an unsigned integer?

In images, what does bit depth refer to?

What does lossy compression do to a file?

What is the purpose of a parity bit?

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