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FC0-U71 Practice Question: A company has a server room with two UPS units,…
A company has a server room with two UPS units, each connected to a separate power circuit. The server room contains 10 servers, each with dual power supplies. One UPS fails and stops providing power. The administrator notices that half of the servers shut down, while the other half remain on. The servers that shut down were all connected to the failed UPS. However, the servers that remained on were also connected to the same UPS via their second power supply. Why did those servers not fail?
⚠ Common exam trap
Test-takers frequently assume all dual-power-supply servers automatically have redundancy, but the question tests the understanding that redundancy only exists if each power supply is connected to a separate, independent power source.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The servers that remained on had both power supplies connected to different UPS units
The servers that remained on had each of their dual power supplies connected to different UPS units (one to the failed UPS and one to the working UPS). When one UPS failed, the working UPS continued to supply power through the second power supply, allowing those servers to stay operational. The servers that shut down were only connected to the failed UPS via both power supplies or had their second power supply connected to the same failed UPS, providing no redundancy.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The servers that shut down were not connected to the working UPS
Why it's wrong here
They likely were, but their power supplies were not redundant.
- ✓
The servers that remained on had both power supplies connected to different UPS units
Why this is correct
Dual power supplies connected to separate UPS units provide redundancy.
- ✗
The failed UPS was overloaded and only some servers lost power
Why it's wrong here
UPS failure typically cuts all connected devices.
- ✗
The servers that remained on had only one power supply connected
Why it's wrong here
If only one, they would have shut down.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U71 exam.