hardMultiple Choice
CV0-004 Practice Question: Refer to the exhibit
Exhibit
Refer to the exhibit. ``` [ERROR] Backup job failed at 2024-08-21 02:00:00. Reason: Volume snapshot creation timed out. Volume ID: vol-0a12345 Snapshot ID: snap-0b67890 ```
Refer to the exhibit. A cloud administrator sees this log after a nightly backup job. Which of the following is the most likely cause of the timeout?
⚠ Common exam trap
CompTIA Cloud+ often tests the misconception that a powered-off instance or missing backup agent is the root cause of snapshot timeouts, when in reality the most common cause is high I/O load on the volume during the snapshot operation.
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 volume has a high I/O load during the snapshot.
The log indicates a timeout during a nightly backup job that involves creating a snapshot. A high I/O load on the volume during the snapshot process can cause the snapshot to take longer than the configured timeout threshold, as the snapshot must capture a consistent point-in-time state while the volume is actively being written to. This is a common issue in cloud environments where the snapshot process competes for disk resources, leading to delays that exceed the timeout limit.
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 volume has a high I/O load during the snapshot.
Why this is correct
Snapshot creation contends with concurrent writes, so sustained I/O pressure delays completion until the job exceeds its timeout window. The log timing aligns with the backup overlapping peak disk activity rather than a network or credential fault.
- ✗
The volume is attached to an instance that is powered off.
Why it's wrong here
A powered-off instance still presents its attached volume, and backup agents can often read it; the timeout stems from the agent failing to reach the backup service, not the instance state. Powered-off instances are relevant when troubleshooting snapshot consistency, not agent connectivity timeouts.
- ✗
The snapshot target region is unreachable.
Why it's wrong here
Snapshot target region reachability affects replication, not the nightly backup job's agent communication. It tempts because cross-region operations are common failure points, but the timeout occurs before any snapshot transfer, pointing to the backup service endpoint being unreachable from the instance.
- ✗
The backup agent is not installed.
Why it's wrong here
A missing agent would produce an installation or connection-refused error, not a timeout after the job starts. It tempts because agent problems are common, but the log shows the job initiating, so the agent is present; the timeout instead reflects a network or endpoint reachability failure.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 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 CV0-004 exam.