SY0-501 Question #99: Real Exam Question with Answer & Explanation

Question

The Chief Technology Officer (CTO) of a company, Ann, is putting together a hardware budget for the next 10 years. She is asking for the average lifespan of each hardware device so that she is able to calculate when she will have to replace each device. Which of the following categories BEST describes what she is looking for?

Options

• AALE
• BMTTR
• CMTBF
• DMTTF

Explanation

The question asks for the best metric to determine the average lifespan of hardware devices for future replacement budgeting. Mean Time To Failure (MTTF) is the most appropriate metric for this purpose.

Common mistakes.

• A. Annualized Loss Expectancy (ALE) is a financial calculation used in risk management to quantify the expected monetary loss due to a risk event over a year, not the physical lifespan of hardware.
• B. Mean Time To Repair (MTTR) measures the average time required to repair a failed system or component and return it to operational status, which relates to recovery, not total operational lifespan.
• C. Mean Time Between Failures (MTBF) measures the average time between failures for repairable systems, implying repair and continued use, whereas MTTF directly addresses the expected total operational life before a non-repairable item needs replacement.

Concept tested. Hardware reliability and maintenance metrics

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