The answer is to review the application logs for errors or performance issues first. This is correct because intermittent latency spikes in a load-balanced cloud application are often caused by application-level bottlenecks, such as slow database queries, memory leaks, or inefficient code, rather than by the load balancer or network itself. Application logs provide the most direct evidence of these issues, allowing you to pinpoint the root cause before wasting time investigating infrastructure components. On the CompTIA Cloud+ CV0-004 exam, this question tests the principle of troubleshooting from the application layer down, a common trap is to jump immediately to network metrics or load balancer logs, which often show normal averages during intermittent spikes. A useful memory tip is "Logs First, Network Last"—always start with what the application is telling you before blaming the cloud fabric.
CV0-004 Operations and Support Practice Question
This CV0-004 practice question tests your understanding of operations and support. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A cloud administrator notices that a web application is experiencing intermittent latency spikes. The application runs on a load-balanced set of virtual machines in a public cloud. Which of the following should the administrator investigate FIRST?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Review the application logs for errors or performance issues.
Option D is correct because intermittent latency spikes in a load-balanced web application are most effectively diagnosed by first reviewing application logs for errors or performance issues. Application logs can reveal slow database queries, memory exhaustion, or code-level bottlenecks that cause latency, which is the most direct source of evidence before investigating network or infrastructure components.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Verify that the VMs are in the same availability zone.
Why it's wrong here
VMs in different zones can add cross-zone latency, but this is a design issue, not an intermittent spike cause.
✗
Inspect the network ACLs for any recent changes.
Why it's wrong here
Network ACLs control traffic flow but rarely cause intermittent latency spikes unless misconfigured.
✗
Check the load balancer health checks to ensure all instances are healthy.
Why it's wrong here
Health checks verify if instances are up, but latency spikes are not typically caused by health check failures.
✓
Review the application logs for errors or performance issues.
Why this is correct
Application logs can reveal slow queries, resource contention, or code errors that cause intermittent latency.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the principle of starting with the most direct evidence (application logs) rather than jumping to network or infrastructure checks, trapping candidates who assume latency must be a network issue.
Detailed technical explanation
How to think about this question
Application logs often capture request duration, error codes (e.g., 5xx), and resource utilization metrics that correlate with latency spikes. Tools like AWS CloudWatch Logs or Azure Monitor can be used to search for patterns, while distributed tracing (e.g., OpenTelemetry) helps pinpoint the exact service or database call causing the delay. In a real-world scenario, a slow SQL query or a memory leak in the application code is a common root cause that would not be visible in network ACLs or health checks.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Operations and Support — This question tests Operations and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Review the application logs for errors or performance issues. — Option D is correct because intermittent latency spikes in a load-balanced web application are most effectively diagnosed by first reviewing application logs for errors or performance issues. Application logs can reveal slow database queries, memory exhaustion, or code-level bottlenecks that cause latency, which is the most direct source of evidence before investigating network or infrastructure components.
What should I do if I get this CV0-004 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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