SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
A company is migrating a critical application to AWS and needs to ensure high availability across two Availability Zones. The application runs on EC2 instances behind an Application Load Balancer (ALB). The database is an on-premises SQL Server that will be migrated later. Which architecture provides high availability for the application tier during the migration?
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 EC2 instances in two AZs behind an ALB with cross-zone load balancing enabled.
ALB distributes traffic to instances in two AZs. Option B is wrong because a single AZ is not highly available. Option C is wrong because a Network Load Balancer is for TCP/UDP, not HTTP. Option D is wrong because Route 53 alone does not provide load balancing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deploy EC2 instances in two AZs behind an ALB with cross-zone load balancing enabled.
Why this is correct
ALB with instances in two AZs provides high availability.
- ✗
Deploy EC2 instances in a single AZ with an Auto Scaling group.
Why it's wrong here
Single AZ offers no protection against AZ failure.
- ✗
Deploy EC2 instances in two AZs behind a Network Load Balancer (NLB).
Why it's wrong here
NLB is for TCP/UDP traffic; ALB is appropriate for HTTP applications.
- ✗
Use Amazon Route 53 weighted routing to distribute traffic to instances in two AZs.
Why it's wrong here
Route 53 provides DNS-level routing but not load balancing features.
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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.