The correct action is to increase the memory allocation for the Lambda functions. This works because AWS Lambda allocates CPU power proportionally to the configured memory, so doubling the memory also doubles the available vCPU, directly reducing execution time for compute-bound tasks. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding that Lambda performance tuning is primarily about memory, not about instance types or execution time limits—common traps include confusing provisioned concurrency (which only reduces cold starts) with runtime performance. Remember that for Lambda, more memory equals more CPU, making it the go-to lever for improving performance during peak loads. A useful memory tip: "Memory is the master dial—turn it up to speed up compute."
SOA-C02 Cost and Performance Optimization Practice Question
This SOA-C02 practice question tests your understanding of cost and performance optimization. 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 using AWS Lambda functions to process events from Amazon S3. The functions are invoked several thousand times per minute. The SysOps administrator notices that the functions are taking longer to execute during peak times. Which action should the administrator take to improve performance?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the memory allocation for the Lambda functions.
Option A is correct because increasing the memory allocation for a Lambda function also increases the CPU allocation proportionally, which can reduce execution time for compute-bound tasks. Option B is wrong because Lambda functions cannot use provisioned concurrency by default; provisioned concurrency is for initializing execution environments to reduce cold starts, but it does not directly improve execution time. Option C is wrong because using a larger instance type is not applicable to Lambda; Lambda abstracts the underlying compute. Option D is wrong because Lambda functions do not have a maximum execution time that can be extended beyond 15 minutes; that is a hard limit.
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 Lambda function timeout.
Why it's wrong here
Timeout does not affect performance; it only sets a maximum duration.
✗
Use a larger EC2 instance type for the Lambda functions.
Why it's wrong here
Lambda does not expose underlying EC2 instances.
✓
Increase the memory allocation for the Lambda functions.
Why this is correct
More memory provides more CPU, speeding up execution.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable provisioned concurrency on the Lambda functions.
Why it's wrong here
Provisioned concurrency reduces cold starts, not execution duration.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-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.
Cost and Performance Optimization — This question tests Cost and Performance Optimization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Increase the memory allocation for the Lambda functions. — Option A is correct because increasing the memory allocation for a Lambda function also increases the CPU allocation proportionally, which can reduce execution time for compute-bound tasks. Option B is wrong because Lambda functions cannot use provisioned concurrency by default; provisioned concurrency is for initializing execution environments to reduce cold starts, but it does not directly improve execution time. Option C is wrong because using a larger instance type is not applicable to Lambda; Lambda abstracts the underlying compute. Option D is wrong because Lambda functions do not have a maximum execution time that can be extended beyond 15 minutes; that is a hard limit.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-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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