- A
Enable automatic node replacement in the EMR cluster
EMR can automatically replace Spot Instances that are interrupted.
- B
Manually relaunch the cluster after failures
Why wrong: Manual intervention is not automated.
- C
Configure the application to checkpoint to S3 every few minutes
Why wrong: Checkpointing helps resume but doesn't prevent failure.
- D
Use only On-Demand instances for task nodes
Why wrong: Increases cost; not the best option.
Question 812 of 1,786
DEA-C01 Data Operations and Support Practice Question
This DEA-C01 practice question tests your understanding of data operations and support. 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 runs an Amazon EMR cluster that processes data from S3 and writes results back to S3. The cluster uses Spot Instances for task nodes. Some tasks are failing due to Spot Instance interruptions. What is the BEST way to handle this without manual intervention?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
✓
Enable automatic node replacement in the EMR cluster
Option A is correct because Amazon EMR's automatic node replacement feature automatically detects when a Spot Instance is interrupted and launches a replacement instance, ensuring the cluster continues processing without manual intervention. Option B is incorrect because manually relaunching the cluster requires human intervention and is not automated. Option C is incorrect because while checkpointing to S3 can help recover data after failures, it does not automatically replace interrupted instances. Option D is incorrect because using only On-Demand instances eliminates cost savings from Spot Instances and does not address the interruption handling problem—it avoids interruptions entirely by not using Spot Instances, but the best approach is to handle interruptions automatically with automatic node replacement.
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.
- ✓
Enable automatic node replacement in the EMR cluster
Why this is correct
EMR can automatically replace Spot Instances that are interrupted.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Manually relaunch the cluster after failures
Why it's wrong here
Manual intervention is not automated.
- ✗
Configure the application to checkpoint to S3 every few minutes
Why it's wrong here
Checkpointing helps resume but doesn't prevent failure.
- ✗
Use only On-Demand instances for task nodes
Why it's wrong here
Increases cost; not the best option.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Operations and Support — This question tests Data Operations and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable automatic node replacement in the EMR cluster — Option A is correct because Amazon EMR's automatic node replacement feature automatically detects when a Spot Instance is interrupted and launches a replacement instance, ensuring the cluster continues processing without manual intervention. Option B is incorrect because manually relaunching the cluster requires human intervention and is not automated. Option C is incorrect because while checkpointing to S3 can help recover data after failures, it does not automatically replace interrupted instances. Option D is incorrect because using only On-Demand instances eliminates cost savings from Spot Instances and does not address the interruption handling problem—it avoids interruptions entirely by not using Spot Instances, but the best approach is to handle interruptions automatically with automatic node replacement.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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