DEA-C01 Data Store Management Practice Question
Which THREE of the following are benefits of using Amazon DynamoDB Accelerator (DAX)? (Choose three.)
⚠ Common exam trap
It's easy for candidates to assume DAX improves write performance or supports write-through caching, but DAX is strictly a read cache and does not accelerate or batch writes.
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
✓
Offloads read traffic from the DynamoDB table.
DAX acts as a read-through cache that offloads read traffic from the DynamoDB table, reducing the number of read requests that hit the underlying table and thus lowering the consumed read capacity units (RCUs). This allows the table to handle more concurrent reads without scaling up provisioned capacity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Offloads read traffic from the DynamoDB table.
Why this is correct
DAX handles read requests, reducing load on the table.
- ✗
Improves write throughput by batching writes.
Why it's wrong here
DAX does not batch writes.
- ✓
Reduces read latency from single-digit milliseconds to microseconds.
Why this is correct
DAX significantly reduces read latency.
- ✗
Supports write-through caching to improve write performance.
Why it's wrong here
DAX is primarily for reads, not writes.
- ✓
Provides in-memory caching for DynamoDB tables.
Why this is correct
DAX is a caching layer in memory.
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Same concept, more angles
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Variation 1. Which TWO of the following are benefits of using Amazon DynamoDB Accelerator (DAX)? (Choose TWO.)
medium- A.Improves write throughput
- ✓ B.Provides microsecond read latency
- ✓ C.Offloads read traffic from the DynamoDB table
- D.Provides data durability across Availability Zones
- E.Reduces storage costs
Why B: Amazon DynamoDB Accelerator (DAX) is an in-memory cache that sits between your application and DynamoDB, providing microsecond response times for read-heavy workloads. It achieves this by caching frequently accessed data in memory, reducing the latency from single-digit milliseconds to microseconds for eventually consistent reads.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.