← DOP-C02·Amazon Web Services

Question 645 of 1,740

Resilient Cloud Solutions →easyMultiple ChoiceObjective-mapped

Quick Answer

The correct answer is to use S3 event notifications to trigger an AWS Step Functions workflow that processes the file asynchronously. This approach resolves the Lambda timeout issue because Lambda functions have a hard 15-minute execution limit, which is easily exceeded when processing large files. By offloading the work to a Step Functions workflow, you can orchestrate long-running tasks, split the file into smaller chunks, or invoke multiple Lambda functions in sequence without hitting a single timeout wall. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding of Lambda’s limitations and the appropriate use of asynchronous orchestration patterns for resilience. A common trap is to assume that simply increasing the Lambda timeout or memory will solve the problem, but these adjustments still cannot bypass the 15-minute ceiling. Memory tip: think “Lambda’s clock stops at 15—Step Functions keeps the process alive.”

DOP-C02 Resilient Cloud Solutions Practice Question

This DOP-C02 practice question tests your understanding of resilient cloud solutions. 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 company runs a serverless application using AWS Lambda functions behind an Amazon API Gateway. The application processes user uploads stored in an S3 bucket. The Lambda function writes results to a DynamoDB table. Recently, the function started timing out when processing large files. What should the DevOps engineer do to improve resilience for large file processing?

Question 1easymultiple choice

Full question →

A
Increase the Lambda function memory to improve CPU performance.
Why wrong: More memory speeds up processing but does not solve the timeout issue if the file is very large; the function may still time out.
B
Use S3 event notifications to trigger an AWS Step Functions workflow that processes the file asynchronously.
Step Functions can orchestrate long-running tasks, breaking the file into chunks or using parallel processing, avoiding Lambda timeouts.
C
Increase the Lambda function timeout to the maximum 15 minutes.
Why wrong: Increasing timeout may help but doesn't address the fundamental issue of processing large files synchronously; also, API Gateway has a 29-second timeout.
D
Add Amazon ElastiCache to cache processed results and reduce Lambda execution time.
Why wrong: Caching doesn't help with processing new large files.

Full breakdown with real-world context →

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

✓

Use S3 event notifications to trigger an AWS Step Functions workflow that processes the file asynchronously.

Option B is correct because Lambda has a maximum execution timeout of 15 minutes. For large files, using S3 event notifications to trigger an asynchronous step function or using S3 batch operations is more resilient. Option A (increasing timeout) might not be enough if the file is very large. Option C (ElastiCache) is not relevant. Option D (increasing memory) might help but still has timeout limits.

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 memory to improve CPU performance.
Why it's wrong here
More memory speeds up processing but does not solve the timeout issue if the file is very large; the function may still time out.
✓
Use S3 event notifications to trigger an AWS Step Functions workflow that processes the file asynchronously.
Why this is correct
Step Functions can orchestrate long-running tasks, breaking the file into chunks or using parallel processing, avoiding Lambda timeouts.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the Lambda function timeout to the maximum 15 minutes.
Why it's wrong here
Increasing timeout may help but doesn't address the fundamental issue of processing large files synchronously; also, API Gateway has a 29-second timeout.
✗
Add Amazon ElastiCache to cache processed results and reduce Lambda execution time.
Why it's wrong here
Caching doesn't help with processing new large files.

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 DOP-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.

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FAQ

Questions learners often ask

What does this DOP-C02 question test?

Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Use S3 event notifications to trigger an AWS Step Functions workflow that processes the file asynchronously. — Option B is correct because Lambda has a maximum execution timeout of 15 minutes. For large files, using S3 event notifications to trigger an asynchronous step function or using S3 batch operations is more resilient. Option A (increasing timeout) might not be enough if the file is very large. Option C (ElastiCache) is not relevant. Option D (increasing memory) might help but still has timeout limits.

What should I do if I get this DOP-C02 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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This DOP-C02 practice question is part of Courseiva's free Amazon Web Services 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 DOP-C02 exam.