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Stacks

5 minutes 5 Questions

A stack is a group of related resources provisioned by AWS CloudFormation based on the provided template. When you create, update, or delete a stack, CloudFormation automatically manages all the resources defined in the template file. Stacks can be created, updated, and deleted from templates uploa…

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AWS Certified Solutions Architect - Stacks Example Questions

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Question 1

Your company has an existing cloudformation stack for deploying web applications. Your team wants to create a new stack to deploy a data processing application while keeping the resources organized. What is the best approach?

Correct Answer: Create a new CloudFormation stack for the data processing application

Creating a new CloudFormation stack for the data processing application is the best approach to maintain organization and separate resources. Editing the existing stack or deleting it may disrupt the web applications, manually creating resources will not provide the same level of automation, and combining them in different ways could lead to confusion.

Question 2

Your company uses AWS CloudFormation to provision environments. You need to control what happens to a specific S3 bucket when its CloudFormation stack is deleted (for example, to retain the bucket instead of deleting it). Which resource attribute should you set?

Correct Answer: DeletionPolicy

DeletionPolicy is a CloudFormation resource attribute that controls what happens to a resource when its stack is deleted. For an S3 bucket, setting DeletionPolicy allows you to ensure the bucket is retained (Retain) or removed (Delete) upon stack deletion. This attribute does not govern update-time behavior. DependsOn only controls creation/deletion order, Condition controls whether a resource is created at all based on a condition, and CreationPolicy helps ensure resource creation is complete before proceeding.

Question 3

You plan to deploy an environment consisting of an EC2 instance and an RDS instance using AWS CloudFormation. The RDS instance must only be accessible to the EC2 instance in the same stack. What should you do?

Correct Answer: Create a security group for the RDS instance and specify a rule allowing access from the EC2 instance security group

The correct method is to create a security group for the RDS instance and specify a rule allowing access from the EC2 instance's security group. Other options either expose the RDS instance to more security risks, involve unnecessary complexity, or do not restrict access between the instances as required.

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