A session store needs single-digit-millisecond key-value reads and writes that must scale to unpredictable internet-scale traffic, with no relational queries required. Which database is the best fit?
A.Amazon RDS for Oracle
Relational engines are not optimized for internet-scale simple key-value access.
B.Amazon DynamoDB
Correct. DynamoDB provides consistent single-digit-ms key-value performance at any scale.
C.Amazon Redshift
Redshift is a data warehouse for analytics, not low-latency transactional lookups.
D.Amazon Neptune
Neptune is a graph database — wrong data model for session key-value data.
Why this answer
DynamoDB is a fully managed key-value/document NoSQL service delivering single-digit-millisecond latency at virtually any scale, with automatic partitioning and on-demand capacity — built for exactly this access pattern.
Correct answer: B · Last reviewed 2026-10-25
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