Oracle Cloud Infrastructure 2020 Architect Professional — Question 16

You work for a bank as the lead Oracle Cloud Infrastructure architect. You designed a highly scalable solution for your company's banking application. The architecture includes a load balancer, application servers with autoscaling configuration based on CPU utilization, and an Autonomous Database with Transaction
Processing workload type running in a Virtual Cloud Network (VCN).
During the peak utilization period, the application users complain that the application runs slow.
What are two possible reasons for the application running slow at times? (Choose two.)

Answer options

• A. The VCN does not have a Network Security Group configured to allow traffic from the load balancer to all the application servers in the backend set.
• B. Instance pool in autoscaling configuration for the application servers did not scale out due to compartment quota breach of the VM shapes used by the application servers.
• C. The load balancer is not configured correctly to send traffic to all the listeners of the application servers in the backend set.
• D. Instance pool in autoscaling configuration for the Autonomous Database did not scale out due to misconfigured scaling policy.
• E. Instance pool in autoscaling configuration for the application servers did not scale out due to service limit breach of the VM shapes used by the application servers.

Correct answer: B, D

Explanation

Option B is correct because if the instance pool for the application servers hits a compartment quota breach, it cannot scale out, leading to performance issues. Option D is also correct as a misconfigured scaling policy for the Autonomous Database can prevent it from scaling out, further contributing to the slowdown. The other options do not directly relate to the application performance during peak times.