Which tool can be used to test the functionality of a server

Which tool can be used to test the functionality of a server - CompTIA Server+ SK0-005

Question

Which tool can be used to test the functionality of a server's power supply unit?

Answers

POST diagnostic card
Loopback adapter
correct

Power supply tester
Memory module scanner

Explanation

Correct Answer: c. Power supply tester

A power supply tester is specifically designed to test the functionality of a server’s power supply unit (PSU). It checks voltage outputs from the PSU and ensures that each rail (such as +12V, +5V, +3.3V, and others) delivers the correct voltage.

This tool helps diagnose whether the PSU is faulty or operating within specifications, which is crucial when a server fails to power on or experiences random shutdowns.

Why Other Options Are Incorrect:

a. POST diagnostic card: This tool is used to diagnose motherboard or boot issues by displaying error codes during the Power-On Self-Test (POST). It doesn’t directly test the power supply but rather the boot process, so it’s not suitable for PSU testing.
b. Loopback adapter: A loopback adapter tests the functionality of network or serial ports by sending signals back to the system. It’s useful for testing communication interfaces, not power supplies, and has no role in voltage testing.
d. Memory module scanner: This tool checks RAM integrity and functionality. It’s useful for diagnosing memory errors and crashes but cannot assess or verify power supply performance, making it irrelevant for PSU diagnostics.

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