Question 1,099 of 1,663
DBS-C01 Monitoring and Troubleshooting Practice Question
A developer reports that an Amazon RDS for PostgreSQL database instance's storage is full and the instance is in 'storage-full' state. The team wants to resolve this without downtime. Which action should be taken?
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
✓
Modify the DB instance to increase allocated storage
Modifying the allocated storage for an RDS instance is a dynamic operation that can increase storage without downtime. Option A is wrong because creating a read replica requires the source to have available storage and does not resolve the storage issue on the primary instance. Option C is wrong because deleting old automated snapshots does not free up storage on the instance; snapshots are stored separately. Option D is wrong because rebooting does not free storage; it only restarts the instance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a read replica and promote it
Why it's wrong here
Creating a replica requires the source to have free storage.
- ✓
Modify the DB instance to increase allocated storage
Why this is correct
RDS supports dynamic storage scaling without downtime for most engines.
- ✗
Delete old automated snapshots
Why it's wrong here
Snapshots are stored in S3, not on the instance volume.
- ✗
Reboot the DB instance
Why it's wrong here
Rebooting does not free storage.
Visual reference
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Last reviewed: Jun 20, 2026
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.
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