Question 1

When should I choose EC2 vs Lambda for AWS SAA-C03?

Accepted Answer

Choose Lambda for serverless, event-driven processing without server management. Choose EC2 for persistent workloads or custom environments.

Question 2

How do I select S3 storage classes?

Accepted Answer

Use Standard for frequently accessed data, Standard-IA for infrequent access with 30+ day retention, and Glacier for long-term archival.

Question 3

What is the difference between RDS Multi-AZ and Read Replica?

Accepted Answer

Multi-AZ provides high availability with automatic failover. Read Replica provides read scalability by offloading read queries.

AWS SAA Visual