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What do a buffer consist of?

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What do a buffer consist of?

(a) memory and register

(b) memory and peripheral

(c) memory and flag register

(d) memory and pointer

The question was posed to me during an online exam.

Question is taken from Buffers topic in division Buffering and other Data Structures of Embedded Systems

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Best answer
Right option is (d) memory and pointer

Best explanation: The buffer consists of a pointer and memory which can be used to locate the next piece of data to be removed or accessed from the buffer.

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