PAS-C01 Migration Practice Question
A company is migrating a large SAP ERP system to AWS. Which TWO AWS services are essential for high availability and disaster recovery? (Choose two.)
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
✓
AWS Elastic Disaster Recovery (DRS)
Correct options: D and E. AWS Elastic Disaster Recovery (DRS) provides continuous replication and recovery for SAP systems, ensuring disaster recovery. Amazon Route 53 enables DNS failover to route traffic to a secondary region or availability zone, supporting high availability. Option A (CloudWatch) is a monitoring service, not directly for HA/DR. Option B (DMS) is for database migration, not full system recovery. Option C (S3) is storage, not a core HA/DR service.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon CloudWatch
Why it's wrong here
CloudWatch monitors but does not provide DR.
- ✗
AWS Database Migration Service
Why it's wrong here
DMS is for database migration, not full system DR.
- ✗
Amazon S3
Why it's wrong here
S3 is storage, not a DR service.
- ✓
AWS Elastic Disaster Recovery (DRS)
Why this is correct
DRS replicates servers to a secondary region.
- ✓
Amazon Route 53
Why this is correct
Route 53 health checks and failover routing enable HA.
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 |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.