SAP-C02 Design for New Solutions Practice Question
A company is designing a highly available web application on AWS. The application consists of an Application Load Balancer (ALB) that distributes traffic to EC2 instances in an Auto Scaling group across multiple Availability Zones. The application state is stored in an Amazon ElastiCache for Redis cluster. The company wants to minimize downtime during patching of the Redis cluster. What should the company do?
⚠ Common exam trap
Watch out — candidates often confuse scaling (Option A) or manual migration strategies (Option B) with the native high-availability feature of ElastiCache Multi-AZ, which is specifically designed to handle patching and failures with minimal downtime.
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
✓
Deploy the Redis cluster with Multi-AZ and automatic failover enabled across two Availability Zones.
Deploying ElastiCache for Redis with Multi-AZ and automatic failover enabled ensures that if the primary node fails or requires patching, a read replica in a different Availability Zone is automatically promoted to primary, minimizing downtime. This aligns with the requirement for high availability during patching, as ElastiCache handles failover transparently without manual intervention.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the Redis node type to handle the load and rely on the ElastiCache maintenance window.
Why it's wrong here
Patching still causes downtime regardless of node size.
- ✗
Use a blue/green deployment strategy by creating a new Redis cluster and switching the application endpoint.
Why it's wrong here
ElastiCache does not natively support blue/green deployments.
- ✓
Deploy the Redis cluster with Multi-AZ and automatic failover enabled across two Availability Zones.
Why this is correct
Multi-AZ with automatic failover provides high availability during patching.
- ✗
Deploy the Redis cluster as a single node in one Availability Zone and take regular snapshots.
Why it's wrong here
Single node will be unavailable during patching.
Go deeper
Related to this question
About these practice questions
This SAP-C02 question is part of Courseiva's 1,660-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
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.