This DVA-C02 practice question tests your understanding of development with aws services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 Lambda function must retrieve feature flags at runtime with low latency and controlled rollout. Which AWS service is most appropriate?
AWS CloudFormation Parameters
Why wrong: This does not meet the stated requirement as directly as the correct option.
AWS IAM Access Analyzer
Why wrong: This does not meet the stated requirement as directly as the correct option.
Amazon Inspector
Why wrong: This does not meet the stated requirement as directly as the correct option.
AWS AppConfig
Correct for the stated requirement.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS AppConfig
AWS AppConfig is the correct choice because it is purpose-built for managing application configuration at runtime, including feature flags, with support for controlled rollouts (e.g., percentage-based deployments, canary releases) and low-latency retrieval via the AppConfig agent or direct API calls. It integrates with AWS Lambda to fetch configuration values on-demand without requiring a full deployment, enabling dynamic feature toggling.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS CloudFormation Parameters
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
AWS IAM Access Analyzer
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
Amazon Inspector
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
AWS AppConfig
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates may confuse AWS AppConfig with AWS Systems Manager Parameter Store or AWS Secrets Manager, but AppConfig is the only service that combines runtime configuration retrieval with controlled rollout and validation, which is explicitly required for feature flags.
Detailed technical explanation
AWS AppConfig uses a configuration store (e.g., Systems Manager Parameter Store, S3) and supports validators (e.g., JSON Schema, Lambda) to ensure configuration integrity before deployment. It enables gradual rollouts using a deployment strategy (e.g., linear, canary, all-at-once) and can automatically roll back if CloudWatch alarms are triggered, making it ideal for feature flags where risk mitigation is critical. Under the hood, the AppConfig agent caches configurations locally and polls for updates, providing sub-millisecond retrieval for Lambda functions.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
The correct answer is: AWS AppConfig — AWS AppConfig is the correct choice because it is purpose-built for managing application configuration at runtime, including feature flags, with support for controlled rollouts (e.g., percentage-based deployments, canary releases) and low-latency retrieval via the AppConfig agent or direct API calls. It integrates with AWS Lambda to fetch configuration values on-demand without requiring a full deployment, enabling dynamic feature toggling.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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.
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