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FC0-U71 Practice Question: Based on the exhibit, what is the most likely…
Exhibit
Refer to the exhibit. Server log entry: [ERROR] Disk write failure at sector 0x3F2. System halted.
Based on the exhibit, what is the most likely cause of the error?
⚠ Common exam trap
A common mix-up: candidates confuse a 'Disk Boot Failure' with a memory or power issue because they all can cause the system to fail to start, but the specific error message isolates the problem to the storage device.
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
✓
Disk error
The exhibit shows a 'Disk Boot Failure' or similar error, which indicates the system cannot find a valid boot sector on the hard drive. This is most commonly caused by a disk error, such as a corrupted master boot record (MBR), bad sectors, or a disconnected data cable. Option D is correct because the error message directly points to a storage device issue, not a network, power, or memory problem.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Network outage
Why it's wrong here
A network outage would not generate the local hardware error shown in the exhibit. It is tempting because connectivity faults commonly cause failures, and would be correct if the exhibit showed failed pings, unreachable shares or missing network adapters rather than the displayed fault.
- ✗
Power supply failure
Why it's wrong here
A failed power supply produces no boot at all, so the exhibit's specific error could not appear. It is tempting because power faults are a common hardware cause of startup failures, and would be the answer where the device is completely dead with no display output.
- ✗
Bad memory stick
Why it's wrong here
Faulty memory typically triggers beep codes, POST failures or blue screens, not the error the exhibit displays. It is tempting because RAM faults are a frequent hardware cause, and would be correct if the exhibit showed memory-test failures or random crashes rather than the shown message.
- ✓
Disk error
Why this is correct
A disk error, such as a failing drive or unreadable sector, prevents the operating system from accessing required files, producing boot or read failures. The exhibit's error text points to storage-level failure rather than memory, network or application faults.
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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.