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Question 11

A high-altitude weather satellite transmits atmospheric scan data in a compact binary format.

The table below shows the atmospheric classification levels and their corresponding 4-bit binary representations:

ClassificationBinary value
Clear0010
Light Cloud1100
Dense Cloud0111
Storm1001

The metadata header indicates that the scanned area has a width of 5 pixels and a height of 3 pixels.

The raw binary stream representing the pixel grid of the scan is:

001000101100011100101100011110010111110000100010001011000111

The scan data starts at the top-left corner and is processed left-to-right, row-by-row.

Complete the table below by writing the atmospheric classification that each pixel in the 5×3 5 \times 3\,5×3 grid will display.

[2]
Markscheme

Data storage Questions

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

41 exam-style questions on OCR GCSE Computer Science Data storage. Each one has a worked solution and a mark scheme showing where the marks go.

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