DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. 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 is designing a microservices architecture using AWS Lambda. Each microservice has its own DynamoDB table. The Lambda functions need to perform CRUD operations on their respective tables. Which TWO IAM best practices should be applied? (Choose TWO.)
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
✓
Scope the IAM policy resource to the specific DynamoDB table ARN.
Options A and D are correct. A: Using separate IAM roles for each function enforces least privilege. D: Scoping IAM policies to specific DynamoDB tables using ARN ensures functions can only access their own table. Option B is wrong because using a single IAM role violates least privilege. Option C is wrong because using wildcard for all tables grants too much access. Option E is wrong because attaching policies at the account level is too broad.
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.
✗
Grant access to all DynamoDB tables using a wildcard in the resource ARN.
Why it's wrong here
Too permissive.
✗
Use a single IAM role shared by all Lambda functions.
Why it's wrong here
Violates least privilege.
✗
Attach the IAM policy to the AWS account instead of the role.
Why it's wrong here
Not a best practice for fine-grained control.
✓
Scope the IAM policy resource to the specific DynamoDB table ARN.
Why this is correct
Limits access to required resources.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Authentication checks who the user is.
✓
Create a separate IAM role for each Lambda function.
Why this is correct
Enforces least privilege per function.
Clue confirmation
The clue word "best" 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 DVA-C02 questions on access control and AAA configuration.
Development with AWS Services — This question tests Development with AWS Services — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Scope the IAM policy resource to the specific DynamoDB table ARN. — Options A and D are correct. A: Using separate IAM roles for each function enforces least privilege. D: Scoping IAM policies to specific DynamoDB tables using ARN ensures functions can only access their own table. Option B is wrong because using a single IAM role violates least privilege. Option C is wrong because using wildcard for all tables grants too much access. Option E is wrong because attaching policies at the account level is too broad.
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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