SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company runs a critical web application on EC2 instances behind an ALB. The application stores session data in an ElastiCache Redis cluster. During a recent outage, the Redis cluster failed and all active sessions were lost, causing users to be logged out. Which solution would provide the HIGHEST availability for session data?
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
✓
Enable Cluster Mode and deploy Redis in Multi-AZ with replicas.
Enabling Cluster Mode and deploying Redis in Multi-AZ with replicas provides automatic failover and data replication across Availability Zones, ensuring high availability for session data. Option B is wrong because a single-node cluster with backups does not provide automatic failover; backups only help with recovery, not availability. Option C is wrong because disabling persistence reduces durability and does not improve availability. Option D is wrong because increasing instance size does not provide failover or redundancy.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable Cluster Mode and deploy Redis in Multi-AZ with replicas.
Why this is correct
Multi-AZ with replicas provides automatic failover and high availability.
- ✗
Deploy a single-node Redis cluster with automatic backups.
Why it's wrong here
Backups help with recovery but do not prevent downtime during failure.
- ✗
Disable Redis persistence to improve performance.
Why it's wrong here
Disabling persistence reduces durability, not availability.
- ✗
Use a larger Redis instance type to handle more connections.
Why it's wrong here
Scaling up does not provide high availability.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.