N-Step SCAN differs from F-SCAN in that ________.
A) N-Step SCAN prevents indefinite postponement, but F-SCAN does not.
B) N-Step SCAN always provides higher throughput than F-SCAN, but results in a larger variance in response times.
C) N-Step SCAN selects requests it will service during the current sweep according to the number of requests; F-SCAN selects such requests according to time.
D) None of the above-N-Step SCAN and F-SCAN are identical.

Question

Quizplus · Accepted Answer

N-Step SCAN divides the queue into sub-queues of a fixed size (N) and processes them one at a time, while F-SCAN processes all requests present at the start of the sweep, ignoring new requests until the next sweep.

N-Step SCAN Differs from F-SCAN in That ________