ITPEC IP October 2023 Question 14

Running standard processing on an actual system and comparing its performance with other systems — that is a benchmark test.

A benchmark runs the same standard program or workload, chosen to resemble the intended use, on each real system and measures processing time, throughput and the like. Because the work is identical, the results compare systems fairly, for example when choosing hardware or checking a configuration change.

Answer (d)

Why not others:

• •(a) — testing outputs against specifications for various inputs, ignoring the internal structure, is black-box testing
• •(b) — test cases that cover branches and loops of the internal structure are white-box testing
• •(c) — predicting the performance of a system not yet built from a mathematical model and a pseudo program is simulation

Key rule: A benchmark measures a real system running a standard workload; black-box and white-box tests check correctness, and simulation predicts performance from a model.

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