This DEA-C01 practice question tests your understanding of data store management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 uses Amazon DynamoDB as a session store for a web application. During peak hours, the application experiences high latency and throttling on the DynamoDB table. The table has a read capacity of 5000 RCU and write capacity of 2000 WCU. The application reads and writes session data using the session ID as the partition key. What is the most cost-effective solution to reduce throttling?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement DynamoDB Accelerator (DAX) to cache frequent reads.
Option A is correct because implementing DynamoDB Accelerator (DAX) caches reads, reducing read throttling cost-effectively. Option B is incorrect because increasing RCU and WCU would reduce throttling but at higher cost. Option C is incorrect because global tables add complexity and cost, not directly solve throttling. Option D is incorrect because Auto Scaling adjusts capacity based on usage but may not be immediate; also it could increase costs if not tuned.
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.
✗
Enable Auto Scaling on the table to automatically adjust capacity.
Why it's wrong here
Auto Scaling helps but may not be immediate and could increase costs.
✗
Increase the read capacity units (RCU) and write capacity units (WCU) to 10000 each.
Why it's wrong here
This would resolve throttling but at higher cost.
✗
Enable DynamoDB global tables to distribute read traffic.
Why it's wrong here
Global tables are for multi-region replication, not for reducing throttling in a single region.
✓
Implement DynamoDB Accelerator (DAX) to cache frequent reads.
Why this is correct
DAX reduces read load on the table, mitigating throttling cost-effectively.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which DEA-C01 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.
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implement DynamoDB Accelerator (DAX) to cache frequent reads. — Option A is correct because implementing DynamoDB Accelerator (DAX) caches reads, reducing read throttling cost-effectively. Option B is incorrect because increasing RCU and WCU would reduce throttling but at higher cost. Option C is incorrect because global tables add complexity and cost, not directly solve throttling. Option D is incorrect because Auto Scaling adjusts capacity based on usage but may not be immediate; also it could increase costs if not tuned.
What should I do if I get this DEA-C01 question wrong?
Identify which DEA-C01 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.
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This DEA-C01 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 DEA-C01 exam.
Question Discussion
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