DBS-C01 Monitoring and Troubleshooting Practice Question
Which THREE steps should be taken to troubleshoot high replica lag in an Amazon Aurora MySQL DB cluster? (Choose THREE.)
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 network latency between the writer and replica
Options A, C, and E are correct. High replica lag in Amazon Aurora MySQL can be caused by network latency (A), resource contention on the replica (C), or issues with the replication process itself (E). Option B (increasing instance size) is a mitigation, not a troubleshooting step—you diagnose first. Option D (disabling binary logging) would break replication entirely.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Review network latency between the writer and replica
Why this is correct
Network latency can increase replication lag.
- ✗
Increase the instance size of the replica
Why it's wrong here
This is a solution, not a troubleshooting step.
- ✓
Check the replica's CPU and memory utilization
Why this is correct
High resource usage on the replica can cause lag.
- ✗
Disable binary logging on the writer
Why it's wrong here
Disabling binary logging stops replication.
- ✓
Examine the replication thread status using SHOW SLAVE STATUS
Why this is correct
This command shows replication lag and error information.
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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.