CompTIA Server+ (SK0-004) — Question 56

A rack contains 20 1U servers with dual power supplies and two PDUs on separate 15A circuits. Each server is connected to both PDUs, and each server draws
1A of current in normal operation. One of the circuit breakers switches off due to a power surge. Which of the following will happen NEXT?

Answer options

• A. The servers will continue to operate normally due to their redundant power sources.
• B. The servers will shut down gracefully when power is lost on one of the two circuits.
• C. All of the servers will lose power immediately because both circuit breakers will switch off.
• D. Half of the servers will lose power, but the others will continue operating on the good circuit.

Correct answer: C

Explanation

The correct answer is C because when one circuit breaker trips, it results in all servers losing power since they are connected to both PDUs and rely on the circuit for operation. Answer A is incorrect because the redundancy does not protect against a total loss of power from both circuits. Answer B is wrong as the servers do not have the ability to shut down gracefully if they lose power completely. Answer D is also incorrect because if one circuit fails, the servers connected to that circuit will lose power as well.