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.
Refer to the exhibit. An IAM policy is attached to a user. The user tries to delete a database instance named 'prod-mydb' in us-east-1. 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 be denied because the Deny statement explicitly matches the resource.
The Deny statement applies to all resources matching 'prod-*', so the delete action is denied for 'prod-mydb'. Even though the Allow statement permits delete, an explicit Deny overrides any Allow. Option B is correct. Option A (Allowed) ignores the Deny. Option C (Error) is not correct because the policy is valid. Option D (Only if tagged) is not in the policy.
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 be allowed because the Allow statement is broader.
Why it's wrong here
Deny overrides Allow.
✗
The delete will fail with an error because the policy is invalid.
Why it's wrong here
Policy is valid.
✗
The delete will succeed only if the instance is tagged with 'Environment: prod'.
Why it's wrong here
No tag condition in policy.
✓
The delete will be denied because the Deny statement explicitly matches the resource.
Why this is correct
Explicit Deny overrides Allow.
Related concept
Standard ACLs match source addresses.
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 be denied because the Deny statement explicitly matches the resource. — The Deny statement applies to all resources matching 'prod-*', so the delete action is denied for 'prod-mydb'. Even though the Allow statement permits delete, an explicit Deny overrides any Allow. Option B is correct. Option A (Allowed) ignores the Deny. Option C (Error) is not correct because the policy is valid. Option D (Only if tagged) is not in the policy.
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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