- A
AWS Systems Manager Parameter Store
Why wrong: Parameter Store can store configuration but lacks advanced features like validation and deployment strategies.
- B
AWS AppConfig
AppConfig is purpose-built for application configuration, providing validation, deployment, and low-latency retrieval.
- C
Amazon S3
Why wrong: S3 is object storage with higher latency and requires additional logic to manage configuration.
- D
Amazon DynamoDB
Why wrong: DynamoDB is a NoSQL database; overkill for simple configuration and may incur higher costs.
Question 252 of 1,616
AWS AppConfig — Application Configuration Management
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 developer needs to store application configuration data (key-value pairs) that can be accessed by multiple microservices running on EC2 instances. The configuration data changes infrequently but must be retrievable with low latency. Which AWS service should the developer use?
Answer choices
Why each option matters
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 specifically designed to manage and deploy application configuration data (key-value pairs) with low-latency retrieval via the AppConfig agent, which caches configurations locally on EC2 instances. It supports controlled rollouts, validation, and monitoring, making it ideal for infrequently changing configuration data that multiple microservices need to access quickly.
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.
- ✗
AWS Systems Manager Parameter Store
Why it's wrong here
Parameter Store can store configuration but lacks advanced features like validation and deployment strategies.
- ✓
AWS AppConfig
Why this is correct
AppConfig is purpose-built for application configuration, providing validation, deployment, and low-latency retrieval.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon S3
Why it's wrong here
S3 is object storage with higher latency and requires additional logic to manage configuration.
- ✗
Amazon DynamoDB
Why it's wrong here
DynamoDB is a NoSQL database; overkill for simple configuration and may incur higher costs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose AWS Systems Manager Parameter Store because it stores key-value pairs, but they overlook that AppConfig is the specialized service for managing and deploying configuration data with low-latency retrieval and controlled rollouts, which is the specific requirement in the question.
Detailed technical explanation
How to think about this question
AWS AppConfig uses a hosted configuration store and an agent that runs on EC2 instances to poll for configuration updates and cache them locally, achieving sub-millisecond retrieval times. It supports validators (e.g., JSON Schema, Lambda functions) to prevent bad configurations from being deployed, and can automatically roll back changes based on CloudWatch alarms, which is critical for production microservices. In a real-world scenario, a developer might use AppConfig to deploy a feature flag or service endpoint configuration across hundreds of instances without restarting the application, leveraging the agent's polling interval (default 30 seconds) for near-real-time updates.
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 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.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS AppConfig — AWS AppConfig is the correct choice because it is specifically designed to manage and deploy application configuration data (key-value pairs) with low-latency retrieval via the AppConfig agent, which caches configurations locally on EC2 instances. It supports controlled rollouts, validation, and monitoring, making it ideal for infrequently changing configuration data that multiple microservices need to access quickly.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
3 more ways this is tested on DVA-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A developer needs to store application configuration data that can be read by multiple EC2 instances. The data is less than 1 KB and changes frequently. Which AWS service is BEST suited for this?
easy- A.Amazon S3
- B.AWS Systems Manager Parameter Store
- ✓ C.AWS AppConfig
- D.Amazon DynamoDB
Why C: AWS AppConfig is the best choice because it is designed for dynamic, frequent configuration changes that need to be deployed to multiple EC2 instances without redeploying code or restarting applications. It supports hosted configuration data (up to 1 MB) and provides controlled rollouts, validation, and monitoring, making it ideal for sub-1 KB data that changes frequently.
Variation 2. Which TWO AWS services can be used to store and retrieve application configuration data? (Choose two.)
easy- ✓ A.AWS AppConfig
- ✓ B.AWS Systems Manager Parameter Store
- C.AWS Secrets Manager
- D.Amazon S3
- E.AWS CloudFormation
Why A: AWS AppConfig is a feature of AWS Systems Manager that allows you to create, manage, and deploy application configuration data separately from your code. It supports feature flags, tuning parameters, and other dynamic configuration, and can validate configuration changes before deployment to reduce risk. This makes it a correct choice for storing and retrieving application configuration data.
Variation 3. Which TWO AWS services can be used to store and retrieve application configuration data in a serverless application? (Choose two.)
medium- A.Amazon S3
- B.AWS CloudFormation
- ✓ C.AWS AppConfig
- D.AWS Secrets Manager
- ✓ E.Amazon DynamoDB
Why C: AWS AppConfig (option C) is a feature of AWS Systems Manager that enables you to create, manage, and deploy application configuration updates quickly and safely. It is specifically designed for storing and retrieving application configuration data in a decoupled manner, supporting feature flags, tuning parameters, and other dynamic configurations without requiring a full code deployment. This makes it ideal for serverless applications where configuration changes must be applied without redeploying the entire function.
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Last reviewed: Jul 4, 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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