Discussion
Which factor most directly affects system throughput under heavy load ?
Answer: D
The key's answer is CPU scheduling policy.
Throughput is the number of processes or jobs completed per unit time, and it is one of the criteria by which CPU scheduling algorithms are judged. Under heavy load the processor is the contended resource, and the policy that decides which job runs next, and how often it switches, most directly determines how many jobs finish.
Network latency mainly lengthens response time for each request rather than the system's rate of completing work, and disk fragmentation is a secondary effect on I/O. Screen resolution has no bearing on throughput.
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