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Question 18

The file size of a 640 by 480 picture of 256 colours in a 8-bit resolution is

  1. A300 KB
  2. B900 KB
  3. C128 KB
  4. D1024 KB
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Correct answer: (A) 300 KB

Explanation

256 colours need 8 bits = 1 byte per pixel. 640 × 480 = 307,200 bytes, and 307,200 ÷ 1024 = 300 KB.

From DSSSB TGT Computer Science Practice Set 5

This is question 18 of DSSSB TGT Computer Science Practice Set 5. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.