Question 325 of 1,711
DEA-C01 Data Store Management Practice Question
Which THREE actions can help improve read performance in Amazon DynamoDB? (Choose THREE.)
⚠ Common exam trap
The DEA-C01 exam often tests the misconception that strongly consistent reads always improve performance, when in fact they increase latency and RCU consumption, making eventually consistent reads the better choice for read-heavy workloads.
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
✓
Use parallel scans to distribute read load across partitions.
Parallel scans in DynamoDB can improve read performance by dividing a scan operation into multiple segments that are processed concurrently across partitions. This reduces the overall latency of the scan by leveraging the distributed nature of DynamoDB's storage, though it consumes more read capacity units (RCUs) due to the parallel execution.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use DynamoDB global tables to replicate data.
Why it's wrong here
Global tables improve write availability and disaster recovery, not read performance.
- ✓
Use parallel scans to distribute read load across partitions.
Why this is correct
Parallel scans can improve scan performance.
- ✗
Use strongly consistent reads for all queries.
Why it's wrong here
Strongly consistent reads are slower than eventually consistent reads.
- ✓
Enable DynamoDB Accelerator (DAX) to cache reads.
Why this is correct
DAX reduces read latency by caching.
- ✓
Increase the read capacity units (RCU) for the table.
Why this is correct
More RCUs allow more read throughput.
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Last reviewed: Jul 4, 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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