The correct answer is that the ec2:StartInstances action does not support resource-level conditions, so the Condition block checking for the tag 'Environment: production' is never evaluated. AWS IAM policies can only apply resource-based condition keys to actions that explicitly support resource-level authorization, and StartInstances is one of several EC2 actions that operate at the API or instance level without allowing you to filter by resource tags. On the SAP-C02 exam, this is a classic trap: you see a perfectly written Condition block and assume it will work, but the real test is knowing which EC2 actions support resource-level permissions—common ones like RunInstances and TerminateInstances do, while StartInstances, StopInstances, and RebootInstances do not. A quick memory tip: think of actions that change state (start, stop, reboot) as "state changers" that lack resource-level condition support, whereas actions that create or destroy (run, terminate) typically allow it.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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.
Refer to the exhibit. An IAM policy is attached to an IAM group. When a user in the group tries to start a stopped EC2 instance with the tag 'Environment: production', the action fails. 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: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
The policy is attached to a group, not directly to the user.
Why wrong: Group attachment works fine.
B
The user does not have MFA enabled.
Why wrong: No MFA condition in the policy.
C
The policy does not allow 'ec2:StartInstances' on all resources.
Why wrong: It does allow with a condition, but the condition may not be evaluated properly.
D
The 'ec2:StartInstances' action does not support resource-level conditions.
StartInstances only supports instance-level conditions, but the condition is on the resource tag; however, the condition must be on the request, not resource, for such actions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The 'ec2:StartInstances' action does not support resource-level conditions.
Option B is correct because the Condition block requires the resource tag to be 'Environment: production', but the action 'StartInstances' does not support resource-level authorization; it requires 'ec2:StartInstances' to be allowed without conditions, or the condition must be on the request. AWS evaluates conditions on the resource only for actions that support it. Option A is wrong because the policy allows all actions. Option C is wrong because the policy does not enforce MFA. Option D is wrong because the policy is attached to a group, not a user, but that should still work.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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 is attached to a group, not directly to the user.
The policy does not allow 'ec2:StartInstances' on all resources.
Why it's wrong here
It does allow with a condition, but the condition may not be evaluated properly.
✓
The 'ec2:StartInstances' action does not support resource-level conditions.
Why this is correct
StartInstances only supports instance-level conditions, but the condition is on the resource tag; however, the condition must be on the request, not resource, for such actions.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Authentication checks who the user is.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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 Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SAP-C02 questions on access control and AAA configuration.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: The 'ec2:StartInstances' action does not support resource-level conditions. — Option B is correct because the Condition block requires the resource tag to be 'Environment: production', but the action 'StartInstances' does not support resource-level authorization; it requires 'ec2:StartInstances' to be allowed without conditions, or the condition must be on the request. AWS evaluates conditions on the resource only for actions that support it. Option A is wrong because the policy allows all actions. Option C is wrong because the policy does not enforce MFA. Option D is wrong because the policy is attached to a group, not a user, but that should still work.
What should I do if I get this SAP-C02 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SAP-C02 questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Authentication checks who the user is.
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