DEA-C01 Data Operations and Support Practice Question
A data engineer is monitoring an Amazon EMR cluster and notices that the cluster is running out of disk space on the core nodes. Which action can be taken to resolve this issue?
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 EBS volume size attached to core nodes
Increasing the EBS volume size attached to core nodes directly adds storage capacity, resolving the disk space issue. Option A is wrong because reducing HDFS data retention may free space but does not increase available disk space; it could result in data loss. Option B is wrong because changing to a compute-optimized instance type affects CPU and memory, not storage. Option D is wrong because Spot Instances are a pricing model and do not add disk space.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Reduce the retention period of data stored on HDFS
Why it's wrong here
May not be acceptable and doesn't add capacity.
- ✗
Change the core node instance type to a compute-optimized type
Why it's wrong here
Compute-optimized types may have less disk.
- ✓
Increase the EBS volume size attached to core nodes
Why this is correct
More EBS capacity directly adds disk space.
- ✗
Use Spot Instances for core nodes
Why it's wrong here
Spot Instances are cheaper but do not increase disk.
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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.