DBS-C01 Monitoring and Troubleshooting Practice Question
Which THREE actions should be taken to troubleshoot an Amazon RDS for PostgreSQL instance that is unresponsive? (Choose 3.)
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
✓
Verify that the security group allows inbound traffic on the database port
To troubleshoot an unresponsive Amazon RDS for PostgreSQL instance, the standard initial steps are: C) Verify that the security group allows inbound traffic on the database port – connectivity issues are a common cause of unresponsiveness. D) Check the database error logs in CloudWatch Logs – logs may reveal database-specific errors like out-of-memory or corruption. E) Review CloudWatch metrics for CPU, memory, and disk I/O – high utilization can indicate resource exhaustion. Option A (reboot immediately) is wrong because it may destroy diagnostic evidence. Option B (modify instance class) is premature without first assessing the problem.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Reboot the DB instance immediately
Why it's wrong here
Rebooting can clear transient issues but should be done after gathering logs.
- ✗
Modify the DB instance to a larger instance class
Why it's wrong here
Resizing is a long-term fix, not immediate troubleshooting.
- ✓
Verify that the security group allows inbound traffic on the database port
Why this is correct
Network connectivity issues can make instance appear unresponsive.
- ✓
Check the database error logs in CloudWatch Logs
Why this is correct
Error logs may contain clues about crashes or corruption.
- ✓
Review CloudWatch metrics for CPU, memory, and disk I/O
Why this is correct
Metrics can reveal resource exhaustion.
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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.