False Statements Regarding Placement Groups

Answer - A.

The AWS documentation mentions the following on placement groups.

1

You can't merge placement groups.

Instead, you must terminate the instances in one placement group, and then relaunch those instances into the other placement group.

2

A placement group can span peered VPCs; however, you will not get full-bisection bandwidth between instances in peered VPCs.

3

A placement group are of two types..

Cluster Placement Groups - A cluster placement group can't span multiple Availability Zones.

Spread Placement Groups - A spread placement group can span multiple Availability Zones.

For more information, please check:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html

4.You can move an existing instance to a placement group, move an instance from one placement group to another, or remove an instance from a placement group.

Before you begin, the instance must be in the

stopped.

state.

For more information on placement groups, one can visit the below URL:

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html

Placement groups are logical grouping of instances in AWS that are placed together in a single Availability Zone or across multiple Availability Zones for low-latency communication between instances. The following are the explanations of the given options:

A. You can merge placement groups - False

You cannot merge placement groups. Once instances are launched in a placement group, you cannot merge that placement group with another placement group. You can launch instances in the same placement group and move instances between placement groups but cannot merge placement groups.

B. A placement group can span peered VPC's - False

A placement group cannot span peered VPCs. A placement group can only be created in a single VPC and in a single region. However, you can connect instances in different VPCs using VPC peering.

C. A cluster placement group can't span multiple Availability Zones - True

A cluster placement group can only span a single Availability Zone. Instances in a cluster placement group must be launched in the same Availability Zone. This ensures that the instances are located close to each other and have low latency for communication.

D. You can move an existing instance into a placement group - True

You can move an existing instance to a placement group, but there are some limitations. The instance must be in the stopped state before it can be moved to a placement group. Additionally, an instance can only be moved to a placement group that is in the same Availability Zone as the instance.

Therefore, the correct statements are:

A. You cannot merge placement groups. B. A placement group cannot span peered VPC's. C. A cluster placement group can only span a single Availability Zone. D. You can move an existing instance into a placement group.