The answer is to increase both memory and vCPU to 4 GB and 2 vCPUs, as this directly addresses the root cause of latency for CPU-bound tasks on ECS Fargate. When CloudWatch metrics show high CPU utilization during latency spikes, the task is starved for compute resources, and simply adding memory (Option A) does nothing to relieve the CPU bottleneck, while adding only vCPU (Option B) may leave memory insufficient for the workload’s processing needs. This scenario tests your understanding of vertical scaling versus horizontal scaling on the AWS Certified Solutions Architect Professional SAP-C02 exam, where a common trap is to assume that scaling out (Option D) always reduces latency—but for a single, CPU-bound request, a larger task is more effective than distributing work across underpowered tasks. Remember the mnemonic: “CPU-bound? Scale up, not out.”
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 runs a critical application on Amazon ECS with Fargate launch type. The application experiences intermittent latency spikes. CloudWatch metrics show high CPU utilization on tasks during these spikes. The current task definition has 1 vCPU and 2 GB memory. Which improvement will most effectively reduce latency without over-provisioning?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase both memory and vCPU to 4 GB and 2 vCPUs.
Option C is correct because increasing memory and vCPU together can improve performance for CPU-bound tasks. Option A is wrong because increasing only memory doesn't address CPU. Option B is wrong because increasing only vCPU might not be enough if memory is also a bottleneck. Option D is wrong because scaling horizontally may not reduce latency for a single request if the task itself is underpowered.
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 number of tasks (desired count) to distribute the load.
Why it's wrong here
Scaling horizontally won't reduce latency for a single request if each task is underpowered.
✗
Increase the vCPU to 2 while keeping 2 GB memory.
Why it's wrong here
vCPU increase may help, but memory might also be a bottleneck.
✓
Increase both memory and vCPU to 4 GB and 2 vCPUs.
Why this is correct
Balanced increase addresses both CPU and memory constraints.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the memory to 4 GB while keeping 1 vCPU.
Why it's wrong here
Memory increase alone won't help CPU-bound latency.
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.
What to study next
Got this wrong? Here's your next step.
Identify which SAP-C02 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.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Increase both memory and vCPU to 4 GB and 2 vCPUs. — Option C is correct because increasing memory and vCPU together can improve performance for CPU-bound tasks. Option A is wrong because increasing only memory doesn't address CPU. Option B is wrong because increasing only vCPU might not be enough if memory is also a bottleneck. Option D is wrong because scaling horizontally may not reduce latency for a single request if the task itself is underpowered.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-C02 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.
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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