FC0-U71 Tech Concepts and Terminology Practice Question
A technician is troubleshooting a computer that randomly reboots during use. The technician suspects a hardware issue. Which of the following tools would be MOST appropriate to monitor the system's temperature and voltage readings in real time?
⚠ Common exam trap
Test-takers frequently confuse tools that measure electrical properties with those that can monitor system health continuously.
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
✓
Hardware monitoring software
Hardware monitoring software is designed to track system temperatures and voltages in real time, making it ideal for diagnosing random reboots potentially caused by overheating or power issues. A multimeter, loopback plug, and POST card serve different purposes and cannot provide continuous monitoring of these parameters.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Loopback plug
Why it's wrong here
A loopback plug is used to test network ports or serial ports by looping signals back. It does not monitor temperatures or voltages. It is irrelevant to diagnosing random reboots caused by hardware issues like overheating or power instability.
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POST card
Why it's wrong here
A POST card is used to diagnose boot failures by displaying POST codes. It does not monitor temperatures or voltages during normal operation. Since the computer boots and runs before rebooting, a POST card would not help identify the cause of random reboots.
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Multimeter
Why it's wrong here
A multimeter measures electrical properties like voltage, current, and resistance, but it cannot monitor system temperatures or provide real-time voltage readings of internal components while the system is running. It is useful for testing power supply outputs, but not for continuous monitoring of a live system.
- ✓
Hardware monitoring software
Why this is correct
Hardware monitoring software can display real-time temperature and voltage readings from sensors on the motherboard and CPU. This allows the technician to correlate random reboots with overheating or voltage fluctuations. It is the most appropriate tool for this scenario because it provides continuous, non-intrusive monitoring.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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