When Grid Power Goes Out, All Servers in a Rack

question 300

Multiple Choice

When grid power goes out, all servers in a rack lose power immediately. The server administrator confirms the servers have dual power supplies, which are connected to separate PDUs. Each of the PDUs is connected to a different UPS. Which of the following is the MOST likely cause of the problem?

• A) Both of the UPS devices were set for the wrong voltage.
• B) The power circuit was tripped on both PDUs.
• C) The server power supplies failed during the outage.
• D) The UPS batteries were discharged.

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Definitions:

Plus Four Estimate

A technique in estimating a binomial proportion and its confidence interval by adding four observations, two of which are successes and two are failures.

Population Proportion

The fraction or percentage of a population that exhibits a specific attribute or characteristic.

Small Bag

A compact container used for carrying personal items or goods.

Population Proportion

A measure indicative of the part of the entire population that possess a certain trait or feature.