You are planning to serve a web application on the AWS Platform by using EC2 Instances. Which of the below principles would you adopt to ensure that even if some of the EC2 Instances crash, you still have a working application?

Answer options:

A.Using a scalable system
B.Using an elastic system
C.Using a regional system
D.Using a fault tolerant system

Answer - D
A fault-tolerant system is one that ensures that the entire system works as expected, even there are issues.
For more information on designing fault-tolerant applications in AWS, please refer to the below URL:
https://d1.awsstatic.com/whitepapers/aws-building-fault-tolerant-applications.pdf?did=wp_card&trk=wp_card
https://aws.amazon.com/premiumsupport/knowledge-center/autoscaling-fault-tolerance-load-balancer/
https://aws.amazon.com/whitepapers/?whitepapers-main.sort-by=item.additionalFields.sortDate&whitepapers-main.sort-order=desc