DBS-C01 Monitoring and Troubleshooting Practice Question
A database administrator is troubleshooting an issue where an Amazon RDS for PostgreSQL DB instance is not allowing connections. The administrator checks the security group and network ACLs, and they are correctly configured. What is the next step to diagnose the issue?
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
✓
Review the DB instance error logs in Amazon CloudWatch
Reviewing the DB instance error logs in Amazon CloudWatch can reveal connection issues such as authentication failures, SSL/TLS errors, or the maximum number of connections being reached. This is a direct diagnostic step. Option A is incorrect because rebooting may temporarily resolve a connection issue but does not help identify the root cause. Option B is incorrect because modifying the parameter group changes configuration settings, which is not a diagnostic action for existing connection problems. Option C is incorrect because creating a snapshot is for backup and recovery, not for troubleshooting current connectivity.
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
Why it's wrong here
Rebooting may temporarily fix but does not diagnose.
- ✗
Modify the DB instance's parameter group
Why it's wrong here
Changing parameters is not a diagnostic step.
- ✗
Create a DB snapshot
Why it's wrong here
Snapshot is for backup, not diagnosis.
- ✓
Review the DB instance error logs in Amazon CloudWatch
Why this is correct
Logs can show reason for connection failures.
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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.