DBS-C01 Monitoring and Troubleshooting Practice Question
A company is using Amazon RDS for SQL Server with Multi-AZ. The application experiences a brief interruption during a planned maintenance window. The DBA wants to verify that the failover occurred correctly. Which set of metrics should the DBA examine?
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
✓
DatabaseConnections and ReplicaLag
During a Multi-AZ failover, DatabaseConnections drop to zero as existing connections are terminated, then rise again as applications reconnect. ReplicaLag, which measures the delay between primary and standby, becomes zero after failover because the former standby is now the primary. Monitoring these two metrics together provides clear evidence of a failover event. Option A (FreeStorageSpace) does not change during failover. Option C (WriteIOPS and ReadIOPS) may fluctuate but are not direct indicators of failover. Option D (NetworkThroughput) may also vary but is not a specific failover indicator.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
FreeStorageSpace on the primary instance
Why it's wrong here
Storage does not change during failover.
- ✓
DatabaseConnections and ReplicaLag
Why this is correct
Connections drop to zero during failover, and ReplicaLag becomes zero after failover.
- ✗
WriteIOPS and ReadIOPS for both instances
Why it's wrong here
IOPS changes do not definitively confirm a failover.
- ✗
NetworkThroughput on the replica instance
Why it's wrong here
Network throughput is not a failover indicator.
Go deeper
Related to this question
About these practice questions
One of 1,663 original DBS-C01 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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.