A graphic display system has a frame buffer that is 640 pixels wide, 480 pixels high and 1 bit of color depth. If the access time for each pixel on the average is 200 nanoseconds, then the refresh rate of this frame buffer is approximately :
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Correct answer: A. 16 frames per second
Explanation
One frame takes 640 × 480 × 200 ns = 0.0614 s, so about 1/0.0614 ≈ 16 frames per second.
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