SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
A company is migrating a large-scale Hadoop cluster to Amazon EMR. They want to optimize costs by using transient clusters and storing data in Amazon S3. Which feature should they enable on the EMR cluster to improve performance?
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
✓
EMRFS consistent view
Amazon EMRFS with consistent view improves performance when using transient clusters and storing data in Amazon S3 by providing consistent metadata and read-after-write consistency. Option A (Auto Scaling) adjusts cluster size for compute needs, not storage performance. Option B (Kerberos authentication) is a security feature. Option D (EBS-optimized instances) ensures dedicated network bandwidth for EBS volumes, which does not directly enhance S3 I/O performance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Auto Scaling
Why it's wrong here
Auto Scaling adjusts capacity, not storage performance.
- ✗
Kerberos authentication
Why it's wrong here
Kerberos is for security, not performance.
- ✓
EMRFS consistent view
Why this is correct
EMRFS provides consistent view and performance tuning for S3.
- ✗
EBS-optimized instances
Why it's wrong here
EBS-optimized improves EBS performance, not S3.
Visual reference
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 |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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