SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
A company is migrating a stateful application to AWS. The application maintains session state in memory on the application server. Which AWS service should be used to store session state for high availability?
⚠ Common exam trap
SAP-C02 often tests the misconception that any database can store session state; the trap is that candidates may choose RDS for its durability, but session state requires low-latency, high-throughput access, making ElastiCache the correct choice.
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
✓
Amazon ElastiCache
Amazon ElastiCache is an in-memory caching service that supports Redis or Memcached, making it ideal for storing session state with low latency and high availability. It provides sub-millisecond response times and can be configured with Multi-AZ and automatic failover to ensure session data persists even if a node fails. This is the standard AWS solution for externalizing session state in stateless application architectures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon RDS
Why it's wrong here
RDS is a relational database, not optimized for session state.
- ✗
Amazon S3
Why it's wrong here
S3 has higher latency and is not suitable for frequent session reads/writes.
- ✓
Amazon ElastiCache
Why this is correct
ElastiCache stores session state in a managed Redis or Memcached cluster external to the application servers, so any instance can serve any user and sessions survive instance failure. This satisfies the stem's high availability requirement for a stateful application.
- ✗
Amazon EBS
Why it's wrong here
EBS is block storage attached to a single instance, not shared.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Amazon Web Services exam blueprint
This SAP-C02 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 SAP-C02 exam.