試題詳解

7.Assume that a machine cycle consists of three phase: fetch, decode, and execute； besides, the time to execute each phase is T. Then how long do we need to execute n instructions when using the pipelining technique? Note that we assume that these n instructions are independent.
(A) 3nT,
(B) nT,
(C) n +2T,
(D) (n + 2)T.