Question 1,106 of 1,663
DBS-C01 Deployment and Migration Practice Question
Network Topology
A developer is connecting to an RDS for MySQL instance. What is the endpoint address that should be used in the database connection string?
⚠ Common exam trap
Watch out — candidates often confuse the DB instance identifier (a simple name like 'mydb') with the full endpoint, or they mistake the port number (3306) for the address, because MySQL connection strings often list the host and port together, leading to the misconception that the port is part of the endpoint.
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
✓
mydb.123456789012.us-east-1.rds.amazonaws.com
When connecting to an Amazon RDS for MySQL instance, the endpoint is a fully qualified domain name (FQDN) that resolves to the underlying database host. Option B provides the correct FQDN format: a DB instance identifier followed by a randomly generated alphanumeric string, the AWS region, and the rds.amazonaws.com domain. This endpoint is found in the RDS console under the instance's 'Connectivity & security' tab and is required by MySQL clients to establish a TCP connection.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
mydb
Why it's wrong here
The instance identifier is not the endpoint.
- ✓
mydb.123456789012.us-east-1.rds.amazonaws.com
Why this is correct
This is the DNS endpoint address.
- ✗
3306
Why it's wrong here
This is the port number, not the address.
- ✗
Z1R2S3V4X5Y6Z7
Why it's wrong here
This is the hosted zone ID, not the endpoint.
Visual reference
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Last reviewed: Jul 4, 2026
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.
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