The answer is to change the build environment to BUILD_GENERAL1_MEDIUM, as this directly resolves the OutOfMemoryError during the test phase by providing more memory for the Java application. AWS CodeBuild environments have fixed compute and memory allocations per instance type, so moving from the SMALL to MEDIUM tier increases available RAM, which prevents the JVM from running out of heap space during memory-intensive unit tests. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of CodeBuild environment properties versus code-level fixes—common traps include assuming environment variables like MAVEN_OPTS will override the container limit, or that reducing test parallelism (Option B) is more cost-effective than a modest instance upgrade. Remember that CodeBuild charges per minute based on the environment type, so MEDIUM offers the cheapest memory boost without over-provisioning. Memory tip: “Small runs out, Medium fits—right-size the compute, not the code.”
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. 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 uses AWS CodeBuild to compile a Java application. The buildspec.yml includes a pre_build phase that runs unit tests and a build phase that packages the application. Recently, builds have been failing intermittently with 'OutOfMemoryError' during the test phase. The build environment is set to 'BUILD_GENERAL1_SMALL'. What is the MOST cost-effective solution?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the build environment to 'BUILD_GENERAL1_MEDIUM' which has more memory.
Option C is correct because it directly addresses the memory issue by increasing compute resources. Option A may not solve the problem if the test runner doesn't use the environment variable. Option B doesn't increase memory. Option D might not help if memory limit is per instance.
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.
✗
Split the tests into smaller batches using CodeBuild test splitting.
Why it's wrong here
Test splitting does not increase memory per batch.
✓
Change the build environment to 'BUILD_GENERAL1_MEDIUM' which has more memory.
Why this is correct
This increases available memory, solving the OOM error cost-effectively.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure the buildspec to set MAVEN_OPTS='-Xmx512m' to reduce JVM heap usage.
Why it's wrong here
This may help but does not address the root cause of insufficient total memory.
✗
Use multiple CodeBuild jobs to run tests in parallel.
Why it's wrong here
Parallel jobs do not increase memory for each individual job.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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.
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Change the build environment to 'BUILD_GENERAL1_MEDIUM' which has more memory. — Option C is correct because it directly addresses the memory issue by increasing compute resources. Option A may not solve the problem if the test runner doesn't use the environment variable. Option B doesn't increase memory. Option D might not help if memory limit is per instance.
What should I do if I get this DOP-C02 question wrong?
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.
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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