The correct answer is to create a new IAM role with only the required permissions, attach it to the instance profile, and update the instance to use the new profile. This approach restricts the EC2 IAM role permissions without downtime because the instance profile can be swapped at runtime—the AWS credentials service automatically refreshes the temporary credentials, so the application picks up the new, least-privilege role without needing a restart. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding of how instance profiles decouple roles from running instances, a common trap being that modifying the existing role’s policy would immediately affect all instances using it, potentially breaking other workloads. A key memory tip is “profile swap, no restart”—think of the instance profile as a hat you can change while the instance is still wearing it.
DVA-C02 Security Practice Question
This DVA-C02 practice question tests your understanding of security. 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 company uses IAM roles to grant permissions to EC2 instances. The security team notices that an instance is using a role that has administrator privileges, which is a security risk. What is the BEST way to restrict the instance's permissions without disrupting the application?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a new IAM role with only required permissions, attach it to the instance profile, and update the instance to use the new profile.
Option C is correct because creating a new role with only necessary permissions and updating the instance profile allows the application to continue with minimal disruption. Option A would cause downtime. Option B affects all instances using that role. Option D is not sufficient because the application might still use the previous role until restarted.
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.
✗
Remove the existing role from the instance and let the application fail.
Why it's wrong here
This would cause application downtime.
✓
Create a new IAM role with only required permissions, attach it to the instance profile, and update the instance to use the new profile.
Why this is correct
This isolates the change to the specific instance and allows the application to continue.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Authentication checks who the user is.
✗
Modify the trust policy of the existing role to deny access to the instance.
Why it's wrong here
This would immediately break the application.
✗
Attach a permissions boundary to the existing role that limits the maximum permissions.
Why it's wrong here
This would affect all instances using that role, not just the specific one.
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 DVA-C02 questions on access control and AAA configuration.
Security — This question tests Security — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Create a new IAM role with only required permissions, attach it to the instance profile, and update the instance to use the new profile. — Option C is correct because creating a new role with only necessary permissions and updating the instance profile allows the application to continue with minimal disruption. Option A would cause downtime. Option B affects all instances using that role. Option D is not sufficient because the application might still use the previous role until restarted.
What should I do if I get this DVA-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 DVA-C02 questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Authentication checks who the user is.
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