Question

When designing a system, you use the principle of design for failure and nothing will fail”. Which of the following services/features of AWS can assist in supporting this design principle. Choose 3 answers from the options given below?

A) Availability Zones
B) Regions
C) Elastic Load Balancer
D) Pay as you go

Answer 1

A) Availability Zones
B) Regions
C) Elastic Load Balancer

Each AZ is a set of one or more data centers. By deploying your AWS resources to multiple Availability zones , you are designing with failure with mind. So if one AZ were to go down , the other AZ’s would still be up and running and hence your application would be more fault tolerant. For disaster recovery scenarios , one can move or make resources run in other regions And finally one can use the Elastic Load Balancer to distribute load to multiple backend instances within a particular region.