Oracle Cloud Infrastructure 2019 Developer Associate — Question 68

When deploying a highly available, Internet-facing, 2-tier web application on Oracle Cloud Infrastructure (OCI), which design option would you use?

Answer options

• A. Deploy all web servers into one Availability Domain and behind a public load balancer, and deploy two single-node OCI database systems in the same Availability Domain with Data Guard enabled.
• B. Deploy all web servers into multiple Availability Domains and behind a public load balancer, and deploy two single-node OCI database systems across two Availability Domains with Data Guard enabled.
• C. Deploy all web servers into multiple Availability Domains and behind a private load balancer, and deploy two single-node OCI database systems across two Availability Domains with Data Guard enabled.
• D. Deploy all web servers into one Availability Domain, and deploy a single-node OCI database system into a different Availability Domain.

Correct answer: B

Explanation

Option B is the correct choice as it ensures high availability by distributing both the web servers and database systems across multiple Availability Domains, which provides redundancy and failover capabilities. Options A and D place all resources in a single Availability Domain, which does not offer the same level of availability. Option C uses a private load balancer, which is not suitable for an Internet-facing application.