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Which of the processor has a 5 stage pipeline?

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Which of the processor has a 5 stage pipeline?

(a) 80386

(b) 80486

(c) 80286

(d) 80386DX

I had been asked this question during an online exam.

I'd like to ask this question from Features of Intel topic in portion Embedded Processors of Embedded Systems

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Right option is (b) 80486

To explain: 80486 have a five stage pipeline ALU. These include fetch, decode, execute, memory access and write back. This helps in accessing instruction faster and thus makes the processor faster. 80386DX have a three-stage pipelining which only includes fetch, decode and execute.

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