DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. 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 database administrator is trying to delete the RDS instance named 'prod-critical' using the AWS CLI. The IAM policy shown is attached to the user. What will happen?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The delete will fail because the Deny statement explicitly denies the action for that resource.
Option A is correct because the Deny statement explicitly denies the delete action for that specific resource, and Deny always overrides Allow. Option B is wrong because the Allow does not apply to the specific resource due to the Deny. Option C is wrong because the Deny is explicit. Option D is wrong because the Deny is on the action, not condition.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The delete will succeed only if the user includes a condition.
Why it's wrong here
No condition is needed; the Deny is unconditional.
✓
The delete will fail because the Deny statement explicitly denies the action for that resource.
Why this is correct
Deny overrides Allow, so the delete fails.
Related concept
Standard ACLs match source addresses.
✗
The delete will fail because the policy has a syntax error.
Why it's wrong here
The policy syntax is valid.
✗
The delete will succeed because the Allow statement grants permission.
Why it's wrong here
The Deny overrides the Allow.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DBS-C01 ACL questions on filtering logic and placement.
Deployment and Migration — This question tests Deployment and Migration — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: The delete will fail because the Deny statement explicitly denies the action for that resource. — Option A is correct because the Deny statement explicitly denies the delete action for that specific resource, and Deny always overrides Allow. Option B is wrong because the Allow does not apply to the specific resource due to the Deny. Option C is wrong because the Deny is explicit. Option D is wrong because the Deny is on the action, not condition.
What should I do if I get this DBS-C01 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DBS-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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