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.
Network Topology
A developer created the above IAM role for a Lambda function. The function needs to write logs to CloudWatch Logs. What is missing?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The role needs a permissions policy that grants logs:CreateLogGroup, logs:CreateLogStream, and logs:PutLogEvents.
The correct answer is A because Lambda functions require an IAM role with a permissions policy that explicitly allows the `logs:CreateLogGroup`, `logs:CreateLogStream`, and `logs:PutLogEvents` actions to write logs to CloudWatch Logs. Without these permissions, the Lambda function will fail to create log groups or streams and will be unable to send log events, resulting in missing or incomplete log output.
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 role needs a permissions policy that grants logs:CreateLogGroup, logs:CreateLogStream, and logs:PutLogEvents.
Why this is correct
The role has no permissions policy.
Related concept
Read the scenario before looking for a memorised answer.
✗
The trust policy is incorrect; it should allow ec2.amazonaws.com.
Why it's wrong here
Lambda uses lambda.amazonaws.com.
✗
The role name is invalid.
Why it's wrong here
The role name is valid.
✗
The trust policy should not allow Lambda to assume the role.
Why it's wrong here
Lambda needs to assume the role.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may overlook the specific CloudWatch Logs permissions required for Lambda logging and instead focus on trust policy or naming issues, but the missing element is the permissions policy granting the necessary logging actions.
Detailed technical explanation
How to think about this question
Under the hood, the Lambda service uses the `sts:AssumeRole` API to assume the IAM role and receive temporary security credentials. The trust policy must specify the Lambda service principal (`lambda.amazonaws.com`) as the trusted entity, and the permissions policy must include the exact CloudWatch Logs actions (`logs:CreateLogGroup`, `logs:CreateLogStream`, `logs:PutLogEvents`) to allow the function to create and write to log streams. A common subtlety is that `logs:CreateLogGroup` is only needed once per log group name; if the log group already exists, the function can still write logs with just `logs:CreateLogStream` and `logs:PutLogEvents`, but best practice is to include all three.
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.
TExam Day Tips
→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 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The role needs a permissions policy that grants logs:CreateLogGroup, logs:CreateLogStream, and logs:PutLogEvents. — The correct answer is A because Lambda functions require an IAM role with a permissions policy that explicitly allows the `logs:CreateLogGroup`, `logs:CreateLogStream`, and `logs:PutLogEvents` actions to write logs to CloudWatch Logs. Without these permissions, the Lambda function will fail to create log groups or streams and will be unable to send log events, resulting in missing or incomplete log output.
What should I do if I get this DVA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This DVA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DVA-C02 exam.
Question Discussion
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