The correct approach is to use a MySQL proxy that injects session context variables and enable row-level security in the application queries. This works because the proxy sets user-specific session variables at connection time, which your SQL queries can then reference in WHERE clauses to filter rows dynamically—for example, `WHERE user_id = @@session.user_context`. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding that native MySQL on RDS lacks built-in row-level security, so you must implement it at the application or proxy layer. A common trap is choosing IAM policies, but those govern API-level access to the RDS instance, not individual rows; views per user are unscalable, and VPC endpoints control network access only. Remember the memory tip: “Proxy injects, query selects”—the proxy injects the user’s identity into a session variable, and your query selects only matching rows.
DBS-C01 Workload-Specific Database Design Practice Question
This DBS-C01 practice question tests your understanding of workload-specific database design. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 financial services company needs to enforce row-level security on a MySQL database hosted on Amazon RDS. They want to restrict access so that each application user can only see their own data. Which approach should they take?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a MySQL proxy that injects session context variables and enable row-level security in the application queries
Using MySQL proxy with session context variables allows row-level filtering based on user identity. Option A (IAM policy) doesn't apply to database rows. Option B (views per user) is not scalable. Option D (VPC endpoints) doesn't control row access.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Place each user's data in a separate database and use VPC endpoints to isolate access
Why it's wrong here
Overly complex and doesn't use row-level security.
✗
Create separate database views for each user
Why it's wrong here
Not scalable for many users.
✓
Use a MySQL proxy that injects session context variables and enable row-level security in the application queries
Why this is correct
Allows dynamic row filtering per user.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use IAM database authentication and define fine-grained access policies
Why it's wrong here
IAM auth controls login, not row-level filtering.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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.
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a MySQL proxy that injects session context variables and enable row-level security in the application queries — Using MySQL proxy with session context variables allows row-level filtering based on user identity. Option A (IAM policy) doesn't apply to database rows. Option B (views per user) is not scalable. Option D (VPC endpoints) doesn't control row access.
What should I do if I get this DBS-C01 question wrong?
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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