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Multi-Selecthard
Which THREE of the following are benefits of using Amazon DynamoDB Accelerator (DAX)? (Choose three.)
Select 3 answers
A.Offloads read traffic from the DynamoDB table.
B.Improves write throughput by batching writes.
C.Reduces read latency from single-digit milliseconds to microseconds.
D.Supports write-through caching to improve write performance.
E.Provides in-memory caching for DynamoDB tables.
AnswersA, C, E
DAX handles read requests, reducing load on the table.
Why this answer
Option A is correct because 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.
Exam trap
The trap here is that candidates often assume DAX improves write performance or supports write-through caching, but DAX is strictly a read cache and does not accelerate or batch writes.