- A
Increase the machine type of the backend instances
Why wrong: Increasing the machine type may improve instance performance, but it does not address underlying health check failures that could be causing latency.
- B
Verify that the backend instances pass health checks
Correct. Health check failures can cause traffic to be concentrated on healthy instances, leading to latency. Verifying health checks is the first step to resolve the issue.
- C
Modify the SSL policy for the load balancer
Why wrong: Modifying the SSL policy affects encryption settings and does not directly impact latency caused by routing or backend health.
- D
Add more backend instances in additional zones
Why wrong: Adding more backend instances in additional zones can help with load distribution, but it does not fix the latency if existing instances are failing health checks.
Troubleshooting HTTPS Load Balancer High Latency
This PCSE practice question tests your understanding of pcse exam topics. 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 company is experiencing high latency on their HTTPS Load Balancer. Which action is most likely to resolve the issue?
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.
Quick Answer
The answer is verifying that backend instances pass health checks, as this is the most direct action to resolve HTTPS load balancer high latency. When health checks fail, the load balancer may continue routing traffic to unhealthy backends, causing retries, timeouts, and degraded performance—all of which manifest as latency. On the Google Professional Cloud Security Engineer exam, this concept tests your understanding of how load balancer health probes interact with backend service configuration; a common trap is jumping to scale-related fixes like increasing instance size or adding zones, which mask the symptom without addressing the root cause. Remember that latency troubleshooting should always start with the health check status dashboard—if backends are marked unhealthy, no amount of scaling or SSL policy changes will fix the routing delay. A useful memory tip: “Health first, scale later—unhealthy backends are the silent latency creators.”
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
Verify that the backend instances pass health checks
Option B is correct because if backend instances fail health checks, the load balancer will stop sending traffic to them, potentially causing traffic to be routed to fewer healthy instances, leading to increased latency. Verifying health checks is the first step in diagnosing latency issues. Option A is wrong because increasing machine type may improve performance but does not address the root cause if instances are unhealthy. Option C is wrong because SSL policy changes affect encryption protocols, not latency. Option D is wrong while adding more instances can distribute load, it does not solve latency caused by unhealthy backends.
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.
- ✗
Increase the machine type of the backend instances
Why it's wrong here
Increasing the machine type may improve instance performance, but it does not address underlying health check failures that could be causing latency.
- ✓
Verify that the backend instances pass health checks
Why this is correct
Correct. Health check failures can cause traffic to be concentrated on healthy instances, leading to latency. Verifying health checks is the first step to resolve the issue.
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.
- ✗
Modify the SSL policy for the load balancer
Why it's wrong here
Modifying the SSL policy affects encryption settings and does not directly impact latency caused by routing or backend health.
- ✗
Add more backend instances in additional zones
Why it's wrong here
Adding more backend instances in additional zones can help with load distribution, but it does not fix the latency if existing instances are failing health checks.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Visual reference
What to study next
Got this wrong? Here's your next step.
Identify which PCSE 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.
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FAQ
Questions learners often ask
What does this PCSE question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Verify that the backend instances pass health checks — Option B is correct because if backend instances fail health checks, the load balancer will stop sending traffic to them, potentially causing traffic to be routed to fewer healthy instances, leading to increased latency. Verifying health checks is the first step in diagnosing latency issues. Option A is wrong because increasing machine type may improve performance but does not address the root cause if instances are unhealthy. Option C is wrong because SSL policy changes affect encryption protocols, not latency. Option D is wrong while adding more instances can distribute load, it does not solve latency caused by unhealthy backends.
What should I do if I get this PCSE question wrong?
Identify which PCSE 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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Last reviewed: Jun 24, 2026
This PCSE practice question is part of Courseiva's free Google Cloud 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 PCSE exam.
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