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Revise Computing is built by a Computer Science teacher. It includes questions and model answers mapped to OCR specification points, for retrieval practice across GCSE and A Level Computer Science.
GCSE · OCR J277
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200+ knowledge organisers and 100+ diagrams across Paper 1, Paper 2 and programming practice. No account needed.
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Data Representation
What is the denary value of the binary number 1011?
Correct Answer:
11
To convert binary 1011 to denary: (1 × 2³) + (0 × 2²) + (1 × 2¹) + (1 × 2⁰) = 8 + 0 + 2 + 1 = 11
A Level · OCR H446
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