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CompTIA Security+ study material · question 239 of 611

A data centre has an uninterruptible power supply but no generator. Which outage is it unable to survive?

  1. A failed power distribution unit
  2. A multi-hour utility failure
  3. A momentary voltage sag
  4. A cooling system fault
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Answer: B. A multi-hour utility failure

An uninterruptible supply bridges short gaps and enables clean shutdown; a generator is what carries a long outage.

Source: NIST SP 800-34 Rev. 1 (NIST) — SP 800-34 Rev. 1 § 3.3 Identify Preventive Controls

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