DEA-C01 Data Operations and Support Practice Question
A data engineer is troubleshooting an AWS Glue ETL job that fails with a memory error when processing a large dataset. Which approach can help reduce memory usage?
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
✓
Increase the number of workers for the job
Increasing the number of workers distributes the workload across more resources, reducing memory pressure per worker. Option A is incorrect because using only one worker reduces parallelism and increases memory consumption per worker, worsening the issue. Option B is incorrect because reducing partitions increases the size of each partition, leading to higher memory usage per task. Option D is incorrect because although increasing the worker type to G.2X provides more memory per worker, it does not increase parallelism and may be less cost-effective than increasing the number of workers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set the job to use only one worker
Why it's wrong here
Using only one worker reduces parallelism and increases memory consumption per worker, worsening the issue.
- ✗
Reduce the number of partitions in the data source
Why it's wrong here
Reducing partitions increases the size of each partition, leading to higher memory usage per task.
- ✓
Increase the number of workers for the job
Why this is correct
Increasing the number of workers distributes the workload across more resources, reducing memory pressure per worker.
- ✗
Increase the worker type to G.2X
Why it's wrong here
Although increasing the worker type to G.2X provides more memory per worker, it does not increase parallelism and may be less cost-effective than increasing the number of workers.
Go deeper
Related to this question
About these practice questions
Courseiva writes every DEA-C01 question from scratch — 1,711 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.