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Question 698 of 1,546

Security and Compliance →hardMultiple ChoiceObjective-mapped

SOA-C02 Security and Compliance Practice Question

This SOA-C02 practice question tests your understanding of security and compliance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 SysOps administrator must grant an IAM user the ability to start and stop specific EC2 instances, but NOT terminate them. The administrator creates a policy with the following statement. However, the user can still terminate instances. What is the MOST likely reason?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "NOT"
Why it matters: Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

Question 1hardmultiple choice

Read the full NAT/PAT explanation →

A
The policy does not restrict the ec2:TerminateInstances action to specific instances using a condition or ARN
The policy allows ec2:TerminateInstances on all instances if the condition is not met, because the condition is only applied if the tag exists; if the tag does not exist, the Allow applies unconditionally.
B
The condition key ec2:ResourceTag is not a valid condition key for EC2 actions
Why wrong: ec2:ResourceTag is a valid condition key.
C
The ec2:TerminateInstances action is not allowed in a customer-managed policy
Why wrong: ec2:TerminateInstances can be allowed in customer-managed policies.
D
The policy does not include an explicit deny for ec2:TerminateInstances
Why wrong: Explicit deny is not required; an allow with a condition should restrict, but the policy structure is flawed.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The policy does not restrict the ec2:TerminateInstances action to specific instances using a condition or ARN

Option A is correct because EC2 actions like StopInstances and StartInstances require a resource-level permission on the instance, but TerminateInstances also requires a resource-level permission. The policy includes ec2:TerminateInstances with a condition, but if the condition is not met, the effect is Allow (since the condition is not satisfied, the statement might still allow termination if the condition is ignored). However, the key issue is that the policy uses ec2:ResourceTag as a condition key, which is valid, but the condition uses StringEquals, which requires the instance to have that tag. If the instance does not have the tag, the condition fails and the Allow does not apply, but there might be an implicit deny? Actually, the policy grants ec2:TerminateInstances with a condition that might not match, so the action is not allowed. But the user can still terminate, meaning the policy is too permissive. The most likely reason is that the policy allows ec2:TerminateInstances without proper resource restriction. Option B is incorrect because the condition key is correct. Option C is incorrect because termination is explicitly allowed with a condition. Option D is incorrect because the policy explicitly allows StartInstances and StopInstances.

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 policy does not restrict the ec2:TerminateInstances action to specific instances using a condition or ARN
Why this is correct
The policy allows ec2:TerminateInstances on all instances if the condition is not met, because the condition is only applied if the tag exists; if the tag does not exist, the Allow applies unconditionally.
Clue confirmation
The clue words "NOT", "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The condition key ec2:ResourceTag is not a valid condition key for EC2 actions
Why it's wrong here
ec2:ResourceTag is a valid condition key.
✗
The ec2:TerminateInstances action is not allowed in a customer-managed policy
Why it's wrong here
ec2:TerminateInstances can be allowed in customer-managed policies.
✗
The policy does not include an explicit deny for ec2:TerminateInstances
Why it's wrong here
Explicit deny is not required; an allow with a condition should restrict, but the policy structure is flawed.

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 SOA-C02 NAT questions on configuration and troubleshooting.

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FAQ

Questions learners often ask

What does this SOA-C02 question test?

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 policy does not restrict the ec2:TerminateInstances action to specific instances using a condition or ARN — Option A is correct because EC2 actions like StopInstances and StartInstances require a resource-level permission on the instance, but TerminateInstances also requires a resource-level permission. The policy includes ec2:TerminateInstances with a condition, but if the condition is not met, the effect is Allow (since the condition is not satisfied, the statement might still allow termination if the condition is ignored). However, the key issue is that the policy uses ec2:ResourceTag as a condition key, which is valid, but the condition uses StringEquals, which requires the instance to have that tag. If the instance does not have the tag, the condition fails and the Allow does not apply, but there might be an implicit deny? Actually, the policy grants ec2:TerminateInstances with a condition that might not match, so the action is not allowed. But the user can still terminate, meaning the policy is too permissive. The most likely reason is that the policy allows ec2:TerminateInstances without proper resource restriction. Option B is incorrect because the condition key is correct. Option C is incorrect because termination is explicitly allowed with a condition. Option D is incorrect because the policy explicitly allows StartInstances and StopInstances.

What should I do if I get this SOA-C02 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "NOT", "most likely". Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.

What is the key concept behind this question?

Static NAT maps one inside address to one outside address.

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