You are using Jenkins as your continuous integration systems for the application hosted in AWS. The builds are then placed on newly launched EC2 Instances. You want to ensure that the overall cost of the entire continuous integration and deployment pipeline is minimized. Which of the below options would meet these requirements? Choose 2 answers from the options given below

Answer options:

A.Ensure that all build tests are conducted using Jenkins before deploying the build to newly launched EC2 Instances.
B.Ensure that all build tests are conducted on the newly launched EC2 Instances.
C.Ensure the Instances are launched only when the build tests are completed.
D.Ensure the Instances are created beforehand for faster turnaround time for the application builds to be placed.

Answer - A and C
To ensure low cost , one can carry out the build tests on the Jenkins server itself. Once the build tests are completed , the build can then be transferred onto newly launched EC2 Instances.
For more information on AWS and Jenkins, please visit the below URL:
https://aws.amazon.com/getting-started/projects/setup-jenkins-build-server/
Option D is incorrect. It would be right choice in case the requirement is to get better speed.