Paper 1 · ICT
1 GB is equal to
A2 to the power 30 bits
B2 to the power 30 bytes ✓ Correct
C2 to the power 20 bits
D2 to the power 20 bytes
Correct answer: (B) 2 to the power 30 bytes — 1 GB equals 2 to the power 30 bytes, so that is the answer.
Explanation
★1 GB equals 2 to the power 30 bytes, so that is the answer.
★Storage sizes are measured in bytes, not bits.
★One kilobyte is 2 to the power 10 bytes and one megabyte is 2 to the power 20 bytes.
★One gigabyte is a further thousand-fold, that is 2 to the power 30 bytes.
★So 1 GB equals 2 to the power 30 bytes.
★The bit-based options are therefore incorrect.
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