The answer is to use AWS Batch running on EC2 or Fargate, because Lambda’s maximum execution time of 15 minutes is a hard limit that cannot be extended, no matter how you orchestrate it. For long-running image processing that exceeds that timeout, you need a compute service designed for jobs with no maximum duration, and AWS Batch automatically provisions and scales the underlying EC2 or Fargate resources to handle the variable processing times. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this question tests your understanding of when to choose Batch over Lambda, and the common trap is assuming Step Functions or SQS can somehow bypass the 15-minute limit—they cannot, because Lambda itself enforces the timeout. A useful memory tip: if a single image takes longer than a coffee break (15 minutes), it’s time to “batch” it out of Lambda.
SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. 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 deploying a serverless application using AWS Lambda. The application processes high-resolution images and stores them in Amazon S3. The processing time for each image is variable, but some images require more than 15 minutes to process. Lambda has a maximum execution time of 15 minutes. How can the company process these long-running image transformations?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS Batch to run the image processing as a job on EC2 or Fargate.
Using AWS Step Functions to orchestrate Lambda functions with a task timeout of 15 minutes does not solve the 15-minute limit. However, splitting the work into parallel Lambda functions each under 15 minutes can process larger images if the work is parallelizable. But if processing a single image takes >15 minutes, you need to use a different compute service like AWS Batch. Option B is correct. Option A is wrong because Lambda still has the 15-minute limit. Option C is wrong because SQS doesn't extend Lambda execution time. Option D is wrong because Step Functions cannot extend Lambda timeout.
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.
✗
Use AWS Step Functions to chain multiple Lambda functions, each processing a part of the image.
Why it's wrong here
If the image processing is not easily parallelizable, this won't help; also each Lambda still limited to 15 min.
✓
Use AWS Batch to run the image processing as a job on EC2 or Fargate.
Why this is correct
AWS Batch can run jobs with longer execution times and can scale based on demand.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon SQS to queue the images and have Lambda poll the queue; the Lambda function can process one image per invocation.
Why it's wrong here
Lambda still has a 15-minute limit per invocation.
✗
Increase the Lambda timeout to 20 minutes.
Why it's wrong here
Lambda maximum timeout is 15 minutes.
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 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.
Design for New Solutions — This question tests Design for New Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Batch to run the image processing as a job on EC2 or Fargate. — Using AWS Step Functions to orchestrate Lambda functions with a task timeout of 15 minutes does not solve the 15-minute limit. However, splitting the work into parallel Lambda functions each under 15 minutes can process larger images if the work is parallelizable. But if processing a single image takes >15 minutes, you need to use a different compute service like AWS Batch. Option B is correct. Option A is wrong because Lambda still has the 15-minute limit. Option C is wrong because SQS doesn't extend Lambda execution time. Option D is wrong because Step Functions cannot extend Lambda timeout.
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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