Question 1,258 of 1,711
DEA-C01 Data Store Management Practice Question
A company is using Amazon DynamoDB for a gaming application with high read and write throughput. The data engineer notices that the read latency is high during peak hours. The table has a partition key only (no sort key). The engineer wants to improve read performance by distributing reads across partitions more evenly. Which action should the engineer take?
⚠ Common exam trap
Many exam-takers confuse increasing capacity (Option A) with improving read distribution, not realizing that latency issues from hot partitions require caching or key redesign, not just more RCUs.
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
✓
Enable DynamoDB Accelerator (DAX).
DynamoDB Accelerator (DAX) is an in-memory cache that reduces read latency from single-digit milliseconds to microseconds by caching frequently accessed items. Since the issue is high read latency during peak hours and the table has only a partition key, DAX offloads reads from the underlying table, distributing the read load and improving response times without changing the table's key structure.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the read capacity units of the table.
Why it's wrong here
This may help throughput but not necessarily latency if partitions are hot.
- ✗
Add a sort key to the table.
Why it's wrong here
Adding a sort key does not affect read distribution.
- ✓
Enable DynamoDB Accelerator (DAX).
Why this is correct
DAX provides a write-through cache, reducing read latency.
- ✗
Enable DynamoDB global tables.
Why it's wrong here
Global tables are for multi-region replication, not read latency improvement.
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Last reviewed: Jun 24, 2026
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.
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