DBS-C01 Management and Operations Practice Question
Network Topology
A database specialist runs the CLI command shown. The output indicates the instance is Multi-AZ and available. The application, however, is experiencing intermittent connection timeouts to the database endpoint. What is the most likely cause?
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
✓
A failover occurred due to a Multi-AZ event.
A Multi-AZ failover can cause transient connection timeouts if the application does not have proper retry logic. The instance status shows 'available', so storage is not full (eliminating D). MySQL 8.0.28 is a supported version (eliminating B). The instance class db.r5.xlarge is current generation and available in the region (eliminating C). Therefore, the intermittent timeouts are most likely due to a failover event.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
A failover occurred due to a Multi-AZ event.
Why this is correct
Failover causes transient connection timeouts until DNS updates.
- ✗
The MySQL engine version is not supported.
Why it's wrong here
MySQL 8.0.28 is a supported version.
- ✗
The DB instance class is not available in the current region.
Why it's wrong here
db.r5.xlarge is a standard instance class.
- ✗
The database storage is full.
Why it's wrong here
The instance status is 'available', not 'storage-full'.
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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.