The answer is misconfigured health checks, which cause the load balancer to incorrectly mark healthy instances as unhealthy and remove them from the traffic pool. When a load balancer’s health checks are too strict or target the wrong endpoint, it stops sending new requests to perfectly capable servers, leaving those requests queued as pending even while the remaining servers’ CPU remains low. On the CompTIA Cloud+ CV0-004 exam, this scenario tests your understanding of how health check logic directly impacts request distribution—a common trap is to blame CPU or network bottlenecks when the real issue is traffic being funneled to too few instances. Remember that pending requests with low CPU almost always point to a health check or scaling configuration problem, not a resource shortage. A useful memory tip: “Healthy servers, bad checks—pending requests pile up on the deck.”
CV0-004 Troubleshooting Practice Question
This CV0-004 practice question tests your understanding of troubleshooting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 is troubleshooting a performance issue where users report slow access to a web application hosted in a public cloud. The application uses an auto-scaling group of web servers behind a load balancer. The administrator notices that the CPU utilization on the web servers is low, but the load balancer metrics show a high number of pending requests. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The load balancer health checks are misconfigured, causing healthy instances to be removed.
Option A is correct because misconfigured health checks can cause the load balancer to stop sending traffic to healthy instances, leading to pending requests. Option B is wrong because API rate limiting affects API calls, not web traffic. Option C is wrong because DNS would cause total inaccessibility, not just slowness. Option D is wrong because blocking port 80 would cause connection failures, not pending requests.
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.
✗
The web servers are throttled by the cloud provider's API rate limiting.
Why it's wrong here
API rate limiting affects API calls, not web traffic.
✗
The DNS records point to an incorrect IP address.
Why it's wrong here
DNS would cause total inaccessibility, not just slowness.
✗
The security group is blocking inbound traffic on port 80.
Why it's wrong here
Blocking port 80 would cause connection failures, not pending requests.
✓
The load balancer health checks are misconfigured, causing healthy instances to be removed.
Why this is correct
Misconfigured health checks can cause the load balancer to stop sending traffic to healthy instances, leading to pending requests.
Clue confirmation
The clue word "most likely" 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
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 practitioner preparing for the CV0-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which CV0-004 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Troubleshooting — This question tests Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The load balancer health checks are misconfigured, causing healthy instances to be removed. — Option A is correct because misconfigured health checks can cause the load balancer to stop sending traffic to healthy instances, leading to pending requests. Option B is wrong because API rate limiting affects API calls, not web traffic. Option C is wrong because DNS would cause total inaccessibility, not just slowness. Option D is wrong because blocking port 80 would cause connection failures, not pending requests.
What should I do if I get this CV0-004 question wrong?
Identify which CV0-004 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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