- A
Amazon S3
Why wrong: S3 is not designed for high-frequency read/write operations like session state; it has higher latency and eventual consistency.
- B
Amazon RDS for MySQL
RDS can be used for session state, though it may require more management; it is a valid option.
- C
Local ephemeral storage on the Fargate task
Why wrong: Ephemeral storage is not shared across tasks and is lost when the task stops.
- D
Amazon DynamoDB
DynamoDB is a NoSQL database that can store session state with low latency and automatic scaling.
- E
Amazon ElastiCache for Redis
Redis is an in-memory data store commonly used for session caching with low latency.
Question 856 of 1,616
Session State Storage Options for ECS Fargate
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. 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 developer is deploying a web application on Amazon ECS with Fargate. The application needs to store session state. Which THREE options are suitable for storing session state in a distributed environment? (Choose THREE.)
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
✓
Amazon RDS for MySQL
Options B, D, and E are correct. Amazon RDS for MySQL (B) can store session state in a distributed environment because it provides a centralized, durable data store accessible from all tasks. However, it may introduce overhead due to relational schema and connection management. Amazon DynamoDB (D) is a fully managed NoSQL database with low latency and high scalability, making it an excellent choice for session state storage. Amazon ElastiCache for Redis (E) is an in-memory data store commonly used for session caching due to its speed and support for data structures like hashes. Options A and C are incorrect. Amazon S3 (A) is object storage with higher latency and not designed for frequent read/write of small session data. Local ephemeral storage on Fargate (C) is not shared across tasks, so it cannot persist session state when tasks scale or fail.
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.
- ✗
Amazon S3
Why it's wrong here
S3 is not designed for high-frequency read/write operations like session state; it has higher latency and eventual consistency.
- ✓
Amazon RDS for MySQL
Why this is correct
RDS can be used for session state, though it may require more management; it is a valid option.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Local ephemeral storage on the Fargate task
Why it's wrong here
Ephemeral storage is not shared across tasks and is lost when the task stops.
- ✓
Amazon DynamoDB
Why this is correct
DynamoDB is a NoSQL database that can store session state with low latency and automatic scaling.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Amazon ElastiCache for Redis
Why this is correct
Redis is an in-memory data store commonly used for session caching with low latency.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
Identify which DVA-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.
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Troubleshooting and Optimization — study guide chapter
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon RDS for MySQL — Options B, D, and E are correct. Amazon RDS for MySQL (B) can store session state in a distributed environment because it provides a centralized, durable data store accessible from all tasks. However, it may introduce overhead due to relational schema and connection management. Amazon DynamoDB (D) is a fully managed NoSQL database with low latency and high scalability, making it an excellent choice for session state storage. Amazon ElastiCache for Redis (E) is an in-memory data store commonly used for session caching due to its speed and support for data structures like hashes. Options A and C are incorrect. Amazon S3 (A) is object storage with higher latency and not designed for frequent read/write of small session data. Local ephemeral storage on Fargate (C) is not shared across tasks, so it cannot persist session state when tasks scale or fail.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-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.
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 →
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Last reviewed: Jun 20, 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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