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Data representation

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Question 26

A radiologist views two digital chest radiographs of the same patient, both displayed at the exact same physical size on a diagnostic monitor.

Radiograph R1 R_1\,R1​ has dimensions of 1024×1024 1024 \times 1024\,1024×1024 pixels. Radiograph R2 R_2\,R2​ has dimensions of 4096×4096 4096 \times 4096\,4096×4096 pixels.

State one reason why Radiograph R2 R_2\,R2​ will display finer anatomical details than Radiograph R1R_1R1​.

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Markscheme

Data representation Questions

  1. GCSE
  2. /Computer Science
  3. /Data representation

40 exam-style questions on Edexcel GCSE Computer Science Data representation, covering Encoding characters with 7-bit ASCII, Representing bitmap images in binary, Representing analogue sound in binary, and Limitations of binary representation. Each one has a worked solution and a mark scheme showing where the marks go.

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