This DBS-C01 practice question tests your understanding of deployment and migration. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A developer is connecting to an RDS for MySQL instance. What is the endpoint address that should be used in the database connection string?
mydb
Why wrong: The instance identifier is not the endpoint.
mydb.123456789012.us-east-1.rds.amazonaws.com
This is the DNS endpoint address.
3306
Why wrong: This is the port number, not the address.
Z1R2S3V4X5Y6Z7
Why wrong: This is the hosted zone ID, not the endpoint.
Answer choices
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
Option B is correct because the endpoint address is the DNS name shown in the output. Option A is wrong because the instance ID is not the endpoint. Option C is wrong because the port is not the address. Option D is wrong because the HostedZoneId is not used as the endpoint.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
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.
Related concept
Read the scenario before looking for a memorised answer.
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.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
The correct answer is: mydb.123456789012.us-east-1.rds.amazonaws.com — Option B is correct because the endpoint address is the DNS name shown in the output. Option A is wrong because the instance ID is not the endpoint. Option C is wrong because the port is not the address. Option D is wrong because the HostedZoneId is not used as the endpoint.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 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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