CompTIA Server+ (SK0-004) — Question 73

A datacenter's redundant PDUs were recently upgraded. Each server rack is connected to the datacenter's PDUs. While testing power redundancy, one of the datacenter PDUs was turned off, and a server rack lost power completely. Which of the following scenarios BEST describes the problem?

Answer options

• A. The rack-mounted PDU was defective.
• B. The UPS was not connected.
• C. The server rack shut down due to bad UPS batteries.
• D. Both rack PDUs were connected to the same circuit.

Correct answer: B

Explanation

The correct answer is B because if the UPS was not connected, it would not provide backup power when one of the PDUs was turned off, leading to a complete power loss for the server rack. Option A is incorrect as the problem is not about a defective PDU; C is wrong since it specifically mentions bad batteries instead of the UPS connection issue, and D is also incorrect because it assumes a problem with circuit configuration rather than the UPS connection.