The answer is that the condition key is incorrect; the policy should use the `ec2:InstanceProfile` condition key with a specific ARN. The mistake occurs because the correct AWS condition key for checking an instance profile is `ec2:InstanceProfileArn`, not `ec2:IamInstanceProfile`—a common typo that causes the policy to never evaluate as intended, allowing instances to launch without any role. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this tests your ability to distinguish between exact condition key names and understand how `ec2:RunInstances` denial logic works with instance profiles; a frequent trap is assuming the `Null` condition works for missing profiles, but it does not evaluate to true when no profile is attached. To fix it, you must specify the exact ARN of the required instance profile in the condition. Memory tip: think "Profile ends with Arn" to recall that the condition key is `ec2:InstanceProfileArn`.
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 company has a production AWS account with multiple IAM users. The security team wants to implement a policy that prevents users from launching EC2 instances without an IAM role that grants access to an S3 bucket containing sensitive data. The policy should also allow users to launch instances with other roles. A SysOps administrator creates an IAM policy that denies ec2:RunInstances if the instance does not have a specific IAM instance profile. However, users are still able to launch instances without any role. What is the most likely reason, and what should be done to fix it?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The condition key is incorrect; the policy should use 'ec2:InstanceProfile' condition key with a specific ARN.
Option C is correct because the condition key for instance profile is ec2:InstanceProfileArn, not ec2:IamInstanceProfile. Option A is wrong because the condition 'Null' does not evaluate to true for missing profile; the condition must check for specific ARN. Option B is wrong because SCPs are not involved unless using Organizations. Option D is wrong because attaching the policy to the user does not fix the condition key issue.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 condition key 'ec2:InstanceProfileArn' is misspelled; it should be 'ec2:IamInstanceProfile'.
Why it's wrong here
The correct key is actually ec2:IamInstanceProfile? No, it's ec2:InstanceProfileArn. The misspelling is not the issue.
✗
The policy should be attached to the user's group instead of the user.
Why it's wrong here
Attaching to group does not fix the condition key.
✗
The policy needs to be applied as a service control policy (SCP) to be effective.
Why it's wrong here
SCPs are for Organizations, not needed here.
✓
The condition key is incorrect; the policy should use 'ec2:InstanceProfile' condition key with a specific ARN.
Why this is correct
The correct condition key is ec2:InstanceProfileArn.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The condition key is incorrect; the policy should use 'ec2:InstanceProfile' condition key with a specific ARN. — Option C is correct because the condition key for instance profile is ec2:InstanceProfileArn, not ec2:IamInstanceProfile. Option A is wrong because the condition 'Null' does not evaluate to true for missing profile; the condition must check for specific ARN. Option B is wrong because SCPs are not involved unless using Organizations. Option D is wrong because attaching the policy to the user does not fix the condition key issue.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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?
Read the scenario before looking for a memorised answer.
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Question Discussion
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