Exam-style question
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Ignoring metadata, how much storage is required for a bitmap that is 100 pixels wide, 50 pixels high and has a colour depth of 8 bits?.
- A.400 bits
- B.4,000 bits
- C.40,000 bits
- D.400,000 bits
Model answer
What a good answer should say
- 40,000 bits
Explanation
Why this works
The image contains 100 × 50 = 5,000 pixels. Storage requirement is 5,000 × 8 = 40,000 bits.
Common mistake
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