Top AWS CloudFormation Interview Questions

In this post we will look at AWS CloudFormation Interview questions. Examples are provided with explanation.




Q: What is AWS CloudFormation?
A:

• AWS CloudFormation is a service that helps you model and set up your Amazon Web Services resources so that you can spend less time managing those resources and more time focusing on your applications that run in AWS. You create a template that describes all the AWS resources that you want (like Amazon EC2 instances or Amazon RDS DB instances), and AWS CloudFormation takes care of provisioning and configuring those resources for you.
• AWS CloudFormation is a configuration orchestration tool that allows you to codify your infrastructure to automate your deployments. CloudFormation templates can be created with YAML in addition to JSON. Or you can use AWS CloudFormation Designer to visually create your templates and see the interdependencies of your resources.
• CloudFormation takes a declarative approach to configuration, meaning that you tell it what you want your environment to look like, and it finds its way there. AWS CloudFormation is a service that helps you model and set up your Amazon Web Services resources so that you can spend less time managing those resources and more time focusing on your applications that run in AWS.
• You create a template that describes all the AWS resources that you want (like Amazon EC2 instances or Amazon RDS DB instances), and AWS CloudFormation takes care of provisioning and configuring those resources for you. AWS CloudFormation is a configuration orchestration tool that allows you to codify your infrastructure to automate your deployments.
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• CloudFormation templates can be created with YAML in addition to JSON. Or you can use AWS CloudFormation Designer to visually create your templates and see the interdependencies of your resources. CloudFormation takes a declarative approach to configuration, meaning that you tell it what you want your environment to look like, and it finds its way there.

Q: What are advantages of AWS CloudFormation?
A: The advantages of AWS CloudFormation are as follows-

• Simplifies Infrastructure Management
• Easy to Use
• Flexible and Declarative
• Customisation through Parameters
• Drag-and-Drop UI to Visualise and Edit
• Ready for Integration
• Model it all AWS CloudFormation permits The user to model The user entire infrastructure during a document. This templet becomes the one supply of truth for The user infrastructure. This helps The user to standardize infrastructure parts used across The user organization, facultative configuration compliance and quicker troubleshooting.
• Automate & Deploy Amazon CloudFormation provisions The user resources during a safe, while not having to perform manual actions or write custom scripts, repeatable manner, permitting The user to make and build The user infrastructure and applications. CloudFormation takes care of decisive the proper operations to perform once managing The user stack and rolls back changes automatically if errors are detected.
• It is Simply Code Codifying the user infrastructure permits The user to treat The user infrastructure as simply code. The user will be able to author it with any code editor, check it into a version system, and review the files with team members before deploying into production.

Q: Which service in AWS allows you to create and delete stacks of AWS?
A: When you use AWS CloudFormation, you manage related resources as a single unit called a stack. You create, update, and delete a collection of resources by creating, updating, and deleting stacks. All the resources in a stack are defined by the stack's AWS CloudFormation template.

Q: What are Features of AWS CloudFormation?
A:

• Authoring with JSON/YAML AWS CloudFormation permits The user to model The user entire infrastructure during a document. The user will be able to use JSON or YAML to explain what AWS resources The user would like to form and put together. If The user would like to style visually, The user will be able to use AWS CloudFormation Designer to assist The user start with AWS CloudFormation templates.
• Safety Controls Amazon CloudFormation automates the provisioning and change of The user infrastructure in a safe and controlled manner. There are not any manual steps or controls which will cause errors. The user will be able to use Rollback Triggers to specify the CloudWatch alarm that CloudFormation ought to monitor throughout the stack creation and update method. If any of the alarms are broken, AWS CloudFormation rolls back the whole stack operation to a previous deployed state.
• Preview Changes to a User Environment AWS CloudFormation modification Sets permit The user to preview however projected changes to a stack would possibly impact The user running resources. as an example, whether or not The user changes can delete or replace any important resources. AWS CloudFormation makes the changes to The user stack solely once The user chooses to execute the modification Set.
• Dependency Management Amazon CloudFormation automatically manages dependencies between The user resources throughout stack management actions. {The user do|The user ar doing} not have to be compelled to worry concerning specifying the order during which resource are created, updated, or deleted. AWS CloudFormation determines the proper sequence of actions to use for every resource once playing stack operations.
• Cross Account and Cross-Region Management AWS StackSets that enables The user to provision a typical set of AWS resources across multiple accounts and regions with one CloudFormation template. StackSets takes care and provides safely provisioning, updating to the best, or deleting stacks in multiple accounts and across various regions. This provides an equivalent level of automation, repeatability, and dependability to stack management operations across regions and accounts.
• Extensibility Amazon CloudFormation allows The user to make custom extensions to The user stack template using AWS Lambda. The user will be able to use Custom Resources, that is associate extensibility mechanism that permits The user to write down custom provisioning during a Lambda perform and have it trigger throughout a CloudFormation stack. The user will be able to write custom provisioning logic for tasks like provisioning a 3rd party resource or trying up the most recent AMI IDs to be used in The user stacks.

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