Which Statement Pertaining to System Reliability Is Not True

question 74

Multiple Choice

Which statement pertaining to system reliability is not true?

• A) Having the latest version of software products can make your system more reliable.
• B) An accumulation of temporary Internet files has no effect on your computer's overall performance.
• C) Removing unnecessary programs from your Startup folder can improve system reliability.
• D) When you defrag your hard drive, it works more efficiently.

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Definitions:

Reactive Power

The portion of electricity that oscillates between the source and load, not converted into useful work, often measured in Volt-Amperes-Reactive (VAR).

True Power

The actual power consumed by a device, calculated in watts as the product of voltage, current, and the cosine of the phase angle for AC circuits.

Clamp-On Ammeter

A type of ammeter that can measure a wire's current without the need to disconnect it from the circuit, by clamping around the wire.

True Power

The actual power consumed by a circuit, measured in watts, as opposed to apparent power, which includes reactive power.