Valid Properties of Placement Groups | AWS Certified Advanced Networking - Specialty Exam

Valid Properties of Placement Groups

Q: Which of the following are valid properties of Placement Groups? Choose 3 answers from the list of options given below.

Placement groups can`t be mergedAn instance can be launched in one placement group at a time; it cannot span multiple placement groupsIf you want to delete a Placement Group you need to terminate or move all instances from it.

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Question

Which of the following are valid properties of Placement Groups? Choose 3 answers from the list of options given below.

Answers

A. A cluster placement group can span across multiple AZ`s.

B. Placement groups can`t be merged

C. An instance can be launched in one placement group at a time; it cannot span multiple placement groups

D. You can`t move an existing instance into a Placement Group.

E. If you want to delete a Placement Group you need to terminate or move all instances from it.

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Explanations

Click on the arrows to vote for the correct answer

A. B. C. D. E.

Answer - B,C and E.

Option A is Incorrect.

A cluster placement group is a logical grouping of instances within a single Availability Zone.

Option D is Incorrect.

You can move an existing instance into a Placement Group.

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

The limitations on placement groups are.

1) A placement group can't span multiple Availability Zones.

2) You can't merge placement groups.

3) A placement group can span peered VPCs.

For more information on placement groups , just browse to the below URL:

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

Placement groups are logical groupings of instances within an Availability Zone (AZ) in AWS. They are used to ensure that instances are placed in close proximity to one another, which can help to reduce network latency and improve network throughput.

The valid properties of Placement Groups are as follows:

A. A cluster placement group can span across multiple AZ's:

False. A cluster placement group is a group of instances within a single AZ. It is used for applications that require low network latency and high network throughput, such as high-performance computing (HPC) applications.

B. Placement groups can't be merged:

True. Once a placement group is created, it cannot be merged with another placement group. However, you can move instances from one placement group to another if needed.

C. An instance can be launched in one placement group at a time; it cannot span multiple placement groups:

True. An instance can only belong to one placement group at a time. If you need to move an instance to another placement group, you will need to stop the instance, change the placement group, and then restart the instance.

D. You can't move an existing instance into a Placement Group:

False. While you can't move an instance from one placement group to another while it is running, you can stop the instance, change the placement group, and then start the instance again.

E. If you want to delete a Placement Group you need to terminate or move all instances from it:

True. Before you can delete a placement group, you must terminate or move all instances that are part of the placement group. Once all instances have been removed, you can then delete the placement group.

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