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Which process takes place when the buffer is empty?

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Which process takes place when the buffer is empty?

(a) read

(b) write

(c) read and write

(d) memory access

The question was asked in an online interview.

This is a very interesting question from Buffer Exchange in portion Buffering and other Data Structures of Embedded Systems

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Best answer
Correct answer is (a) read

The best explanation: The buffer exchange will contain the data in case of the writing process but the buffer will be emptied in the case of the read cycle.

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