DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. 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 data engineer is troubleshooting an AWS Glue ETL job that fails with an OutOfMemory error when processing large JSON files from Amazon S3. The files contain deeply nested structures. Which approach should the engineer take to resolve this issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the DPU (Data Processing Unit) per worker
Option D is correct because using the `recurse` option with `getResolvedOptions` is not relevant; the issue is memory. Option A increases parallelism but not memory per worker. Option B reduces memory. Option C (increase number of workers) adds more workers but each still has the same memory; option D (increase DPU per worker) allocates more memory per worker, solving the OOM issue.
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 the `recurse` option with `getResolvedOptions` to limit recursion
Why it's wrong here
This does not address memory issue.
✗
Increase the number of workers in the Glue job configuration
Why it's wrong here
More workers increase parallelism but not memory per worker.
✓
Increase the DPU (Data Processing Unit) per worker
Why this is correct
More DPU per worker allocates more memory, resolving OOM.
Related concept
Read the scenario before looking for a memorised answer.
✗
Decrease the number of partitions while reading the data
Why it's wrong here
Reducing partitions may increase memory pressure.
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 DEA-C01 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.
Data Ingestion and Transformation — This question tests Data Ingestion and Transformation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Increase the DPU (Data Processing Unit) per worker — Option D is correct because using the `recurse` option with `getResolvedOptions` is not relevant; the issue is memory. Option A increases parallelism but not memory per worker. Option B reduces memory. Option C (increase number of workers) adds more workers but each still has the same memory; option D (increase DPU per worker) allocates more memory per worker, solving the OOM issue.
What should I do if I get this DEA-C01 question wrong?
Identify which DEA-C01 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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This DEA-C01 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 DEA-C01 exam.
Question Discussion
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