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Why is testing with a known working component useful for identifying a computer component problem?

Answer and explanation

Correct answer: It helps isolate the faulty component.

Substitution testing compares the suspect part with an equivalent component that is known to work. If the problem disappears after the replacement, the original part is likely faulty; if it remains, another part or connection may be responsible. Therefore option B is correct. This test does not create backups, increase storage, or replace the operating system.

Related tags

IctHardware-TestingTroubleshootingUsing An Operating System And File ManagementIct (Information & Communication Technology) Skills IIct Information Communication Technology Skills IArtificial IntelligenceClass 9 Mcq

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