DBS-C01 Management and Operations Practice Question
A company is running a MongoDB-compatible Amazon DocumentDB cluster. The application is experiencing high write latency during peak hours. The cluster has one writer and two readers. The DBA suspects that the issue is due to a large number of indexes on the collection. What should the DBA do to verify this hypothesis without affecting production?
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
✓
Create a clone of the cluster using the 'Clone Cluster' feature and test index changes on the clone.
Cloning the cluster using the 'Clone Cluster' feature creates a separate, isolated environment where index changes can be tested without affecting production. Option A is incorrect because taking a snapshot and restoring to a new cluster is time-consuming and does not provide a real-time copy of the current state for testing. Option B is incorrect because AWS DMS is designed for database migration, not for testing index performance. Option C is incorrect because enabling the profiler captures slow queries but does not allow testing of index changes; it only helps identify existing issues.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Take a snapshot of the cluster and restore it to a new cluster to test index changes.
Why it's wrong here
Snapshot restore is point-in-time and may be outdated; also takes time.
- ✗
Use AWS DMS to replicate data to a test cluster and perform index testing there.
Why it's wrong here
DMS is for ongoing replication, not for ad-hoc testing.
- ✗
Enable the profiler on the production cluster to capture slow queries and analyze the index usage.
Why it's wrong here
This helps identify slow queries but does not directly test the impact of indexes on write latency.
- ✓
Create a clone of the cluster using the 'Clone Cluster' feature and test index changes on the clone.
Why this is correct
Cloning creates a copy of the cluster quickly without impacting the source.
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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.