You are creating a new architecture for a financial firm. The architecture consists of some EC2 instances of different types and sizes. The management team has asked you to create this architecture by ensuring the reduction of the risk of simultaneous failures. Which placement group option could you suggest for the instances?

Answer options:

A.Clustered Placement Group
B.Partition Placement Group
C.Multi-AZ Placement Group
D.Spread Placement Group

Answer: D
Option A is incorrect. In Clustered Placement Groups, all the instances are placed in the same rack in the same availability zone. Therefore, they are very susceptible to hardware failures and simultaneous failures. Also, it is suggested to have the same size and types of instances in this Placement Group. More details-
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html
Option B is incorrect. In partition placement groups, the chances of hardware failures and simultaneous failure are reduced compared to the Clustered placement group. Still, the Spread Placement group has fewer chances of this kind of failure. It is also suggested to have the same size and types of instances in this Placement Group. More details-
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html
Option C is incorrect. The Multi-AZ Placement Group does not exist. More details-
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html
Option D is CORRECT. Spread Placement Groups place the instances in different racks. Every rack has its own hardware and power source. So, there is a minimum chance of simultaneous failure. More details-
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html