Learning objective
Bits and bytes: Know that: • the bit is the fundamental unit of information • a byte is a group of 8 bits. A bit is either 0 or 1. Know that the 2n different values can be represented with n bits. For example, 3 bits can be configured in 23 = 8 different ways. 000, 001, 010, 011, 100, 101, 110, 111
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Units of information
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Bits and bytes
Aqa A Level Computer ScienceFundamentals of data representation
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Quick explanation
Bits and bytes: Know that: • the bit is the fundamental unit of information • a byte is a group of 8 bits. A bit is either 0 or 1. Know that the 2n different values can be represented with n bits. For example, 3 bits can be configured in 23 = 8 different ways. 000, 001, 010, 011, 100, 101, 110, 111
- This point belongs to Units of information, especially Bits and bytes.
- You need to be able to bits and bytes: Know that: • the bit is the fundamental unit of information • a byte is a group of 8 bits. A bit is either 0 or 1. Know that the 2n different values can be represented with n bits. For example, 3 bits can be configured in 23 = 8 different ways. 000, 001, 010, 011, 100, 101, 110, 111.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Why it matters
This objective helps connect Bits and bytes to exam-style questions, flashcards, and revision notes for Units of information.
Quick student answer
What is the fundamental unit of information?
Direct answer
Bit
Key terms
- Bit: The fundamental unit of information; it is either 0 or 1.
- Byte: A group of 8 bits.
Common trap
Confusing bits with bytes: A bit is a single unit with a value of 0 or 1. A byte is a group of 8 bits.
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