The correct answer is that the action is denied because the Deny statement explicitly denies the action for production instances. This outcome hinges on the fundamental AWS IAM evaluation logic where an explicit Deny overrides any Allow, regardless of the order in which the policies are evaluated. When a user attempts to terminate an EC2 instance tagged with Environment=production, the Deny statement in the attached group policy matches the resource and action, immediately blocking the termination even if another policy grants the permission. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of IAM policy precedence, particularly how explicit Denies serve as an unbreakable override for security controls like protecting production resources. A common trap is assuming that an Allow statement elsewhere can rescue the action, but remember: Deny always wins. Memory tip: think of the Deny as a "veto" — no matter how many "yes" votes an Allow gets, one explicit Deny kills the motion.
DOP-C02 Security and Compliance Practice Question
This DOP-C02 practice question tests your understanding of security and compliance. 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 group. A user in the group tries to terminate an EC2 instance with the tag 'Environment=production' 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 action is denied because the Deny statement explicitly denies the action for production instances.
Option C is correct because the Deny statement explicitly denies TerminateInstances for instances with tag Environment=production, regardless of any Allow. Option A is wrong because Deny overrides Allow. Option B is wrong because the Deny applies to all instances with that tag. Option D is wrong because the Deny is explicit.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 action is denied because the Deny statement explicitly denies the action for production instances.
Why this is correct
Explicit Deny wins.
Related concept
Static NAT maps one inside address to one outside address.
✗
The action is allowed because there is no explicit Deny for the user.
Why it's wrong here
There is an explicit Deny.
✗
The action is denied only if the instance is in the us-east-1 region.
Why it's wrong here
The Deny applies to the instance, not region-specific beyond resource ARN.
✗
The action is allowed because the Allow statement grants ec2:TerminateInstances.
Why it's wrong here
Deny overrides Allow.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
Security and Compliance — This question tests Security and Compliance — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The action is denied because the Deny statement explicitly denies the action for production instances. — Option C is correct because the Deny statement explicitly denies TerminateInstances for instances with tag Environment=production, regardless of any Allow. Option A is wrong because Deny overrides Allow. Option B is wrong because the Deny applies to all instances with that tag. Option D is wrong because the Deny is explicit.
What should I do if I get this DOP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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