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CV0-004 Practice Question: A company uses an automated patching solution…
A company uses an automated patching solution that reboots instances after applying patches. After a recent patching cycle, several web servers failed to rejoin the load balancer pool. The administrator checks the application logs and finds that the web service failed to start because a required dependency was removed during patching. Which of the following should the administrator implement to prevent this issue in the future?
⚠ Common exam trap
Test-takers frequently confuse operational strategies like rolling updates (which maintain availability during updates) with dependency validation, failing to recognize that rolling updates do not prevent the underlying dependency removal issue that causes the service to fail after reboot.
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
✓
Configure a pre-patch health check and verify critical dependencies.
Implementing a pre-patch health check that verifies critical dependencies ensures that the patching process does not remove or break required components. This proactive validation can detect missing dependencies before the reboot, allowing the administrator to remediate or halt the patching cycle, preventing the web service from failing to start.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Require manual approval before each patching operation.
Why it's wrong here
Manual approval adds overhead but does not automate dependency checks.
- ✗
Increase the patching frequency to reduce the number of patches per cycle.
Why it's wrong here
More frequent patches do not address dependency verification.
- ✗
Implement a rolling update strategy for the web servers.
Why it's wrong here
Rolling updates handle deployment, not dependency verification during patching.
- ✓
Configure a pre-patch health check and verify critical dependencies.
Why this is correct
Pre-patch checks can validate that required services and dependencies are present and functional.
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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.