- A
Use client-side encryption with the EMRFS S3 client.
Why wrong: Client-side encryption introduces performance overhead.
- B
Use SSE-KMS for at-rest and VPC peering for in-transit.
Why wrong: KMS adds latency, and VPC peering does not encrypt traffic.
- C
Disable encryption to maximize performance; use security groups for isolation.
Why wrong: Disabling encryption is not acceptable for financial data.
- D
Enable EMRFS encryption with SSE-S3 for at-rest and enable in-transit encryption using TLS.
SSE-S3 is low overhead, and TLS secures data in transit.
Question 89 of 1,733
PAS-C01 Migration Practice Question
This PAS-C01 practice question tests your understanding of migration. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 is migrating a Hadoop cluster to Amazon EMR. The cluster processes sensitive financial data. Which configuration ensures data encryption at rest and in transit without performance degradation?
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 EMRFS encryption with SSE-S3 for at-rest and enable in-transit encryption using TLS.
Option D is correct because EMRFS with SSE-S3 provides at-rest encryption without performance overhead (SSE-S3 is handled by S3 with minimal latency), and enabling in-transit encryption using TLS secures data in transit without significant performance degradation (EMR handles TLS efficiently). Option A is incorrect because client-side encryption adds overhead on the EMR cluster, potentially degrading performance. Option B is incorrect because VPC peering does not encrypt traffic in transit; for in-transit encryption, TLS should be used. Option C is incorrect because disabling encryption compromises security.
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 client-side encryption with the EMRFS S3 client.
Why it's wrong here
Client-side encryption introduces performance overhead.
- ✗
Use SSE-KMS for at-rest and VPC peering for in-transit.
Why it's wrong here
KMS adds latency, and VPC peering does not encrypt traffic.
- ✗
Disable encryption to maximize performance; use security groups for isolation.
Why it's wrong here
Disabling encryption is not acceptable for financial data.
- ✓
Enable EMRFS encryption with SSE-S3 for at-rest and enable in-transit encryption using TLS.
Why this is correct
SSE-S3 is low overhead, and TLS secures data in transit.
Related concept
Read the scenario before looking for a memorised answer.
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.
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 PAS-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 PAS-C01 question test?
Migration — This question tests Migration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable EMRFS encryption with SSE-S3 for at-rest and enable in-transit encryption using TLS. — Option D is correct because EMRFS with SSE-S3 provides at-rest encryption without performance overhead (SSE-S3 is handled by S3 with minimal latency), and enabling in-transit encryption using TLS secures data in transit without significant performance degradation (EMR handles TLS efficiently). Option A is incorrect because client-side encryption adds overhead on the EMR cluster, potentially degrading performance. Option B is incorrect because VPC peering does not encrypt traffic in transit; for in-transit encryption, TLS should be used. Option C is incorrect because disabling encryption compromises security.
What should I do if I get this PAS-C01 question wrong?
Identify which PAS-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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Last reviewed: Jun 20, 2026
This PAS-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 PAS-C01 exam.
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