DBS-C01 Management and Operations Practice Question
Network Topology
Refer to the exhibit. A database administrator runs the AWS CLI command to retrieve CloudWatch metrics for an Amazon RDS DB instance. The output shows a spike in WriteLatency at 10:05 UTC. What is the most likely cause of this spike?
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
✓
The DB instance's gp2 volume has exhausted its burst credits.
A sudden spike in write latency often indicates that the storage volume has exhausted its burst credits and is now using baseline performance, which may be slower. Option B is incorrect because taking a snapshot causes I/O suspension, not necessarily a latency spike. Option C is incorrect because a large number of concurrent connections typically causes increased CPU and memory usage, not a latency spike. Option D is incorrect because a Multi-AZ failover would cause a brief downtime, not a latency spike.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The DB instance's gp2 volume has exhausted its burst credits.
Why this is correct
A sudden spike in write latency often indicates that the storage volume has exhausted its burst credits and is now using baseline performance, which may be slower.
- ✗
The DB instance is in the process of taking a snapshot.
Why it's wrong here
A snapshot causes I/O suspension, not necessarily a write latency spike.
- ✗
There is a large number of concurrent connections to the DB instance.
Why it's wrong here
A large number of connections typically causes increased CPU and memory usage, not necessarily a latency spike.
- ✗
The DB instance experienced a Multi-AZ failover.
Why it's wrong here
A Multi-AZ failover would cause a brief downtime, not a latency spike.
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 DBS-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 DBS-C01 exam.