December 16, 2022

Top 20 AWS Serverless Application Repository Interview Questions and Answers

 

A managed repository for serverless apps is the AWS Serverless Application Repository. It makes it possible for groups, companies, and even lone engineers to store, distribute, and deploy serverless designs in simple yet effective new ways. You don't have to clone, develop, package, or publish source code to AWS before deploying it if you use the Serverless Application Repository. Instead, you can use pre-built programmes from the Serverless Application Repository in your serverless designs, which will save time, ensure organisational best practises, and enable your teams launch products more quickly. You may govern each application's resources through integration with AWS Identity and Access Management (IAM), which enables you to share applications either publicly or privately with specified AWS accounts. To share an application you've built, publish it to the AWS Serverless Application Repository.

 

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Ques. 1): Serverless applications: what are they?

Answer:

Server provisioning, deployment, and management are not necessary with serverless apps. They automatically and continuously scale, and they have built-in high availability. One of the numerous fully managed AWS services, such as AWS Lambda for computation, Amazon API Gateway for APIs, and Amazon DynamoDB for databases, can be used to create and run serverless applications.

 

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Ques. 2): The AWS Serverless Application Repository offers what types of applications?

Answer:

Applications for Alexa Skills, chatbots, data processing, IoT, real-time stream processing, online and mobile back-ends, social media trend monitoring, and image resizing are all available in the AWS Serverless Application Repository.

 

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Ques. 3): AWS verifies the applications in the AWS Serverless Application Repository?

Answer:

Every application made available by AWS is examined for licence compliance and code quality. To make sure that users know which resources can be modified or accessed by an application, applications released by third parties are checked for proper use of permissions. Prior to employing an application, you can evaluate those specifics as well as the number of times the application has been deployed by AWS clients.


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Ques. 4): The AWS Serverless Application Repository is where I want to publish my serverless application. How do I achieve that?

Answer:

A serverless application can be packaged using the AWS CLI, published using the AWS Management Console, CLI, or AWS SDKs, and described using the AWS Serverless Application Model (SAM) standard. You will need to supply a name, description, source code link, and a LICENSE.txt for your application in addition to having a working AWS account. Applications must be published in the US East (N. Virginia) or US East (Ohio) regions if they are meant to be made available to any AWS user.


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Ques. 5): What is a nested application?

Answer:

A component that is deployed as a part of another serverless application is known as a nested serverless application. Common patterns where the same components are defined in several application templates start to appear as serverless architectures develop. Now, you may create distinct apps for frequently used patterns and nest such applications inside of templates for new or existing applications.


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Ques. 6): How do I package an application that is nested?

Answer:

To package your nested application, use the SAM CLI's sam package command. Using APIs or the AWS SDK, publish your packaged programme to the Serverless Application Repository. To instantly deploy your application, use the SAM CLI's sam deploy command.

 

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Ques. 7): How do I administer serverless programmes installed on my account?

Answer:

The deployment of serverless apps as AWS CloudFormation stacks makes it simple for you to manage an application as a whole. The uniquely identifying Amazon Resource Name (ARN) for the application is associated with each resource, making it easier to find them in the AWS Tag Editor UI. To manage each resource independently, you can also leverage tools from AWS and other companies.


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Ques. 8): What happens if a nested application is no longer accessible?

Answer:

Existing deployments of your application won't be impacted by nesting applications that are removed or to which you lose access. If you try to deploy your application with dependencies that don't exist anymore, you'll have to change it.


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Ques. 9): What is the best way to share an application that has nested applications?

Answer:

The model employed by Lambda functions nowadays is also used by serverless apps. Using AWS IAM resource-based controls, access to serverless apps stored in the Serverless Application Repository can be restricted. You can make your application publicly accessible, allow cross-account access, or keep it private using policies.

 

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Ques. 10): To share an app with an AWS organisation, how do I update resource-based policies?

Answer:

Find the application in the AWS Serverless Application Repository console, select the "Share" option, and then select "Create Statement" to get going. To provide the organisation access to the app, add the AWS Organization principal here. Additionally, you can adjust resource-based policies to distribute apps around an organisation by using the AWS Serverless Application Repository APIs.

 

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Ques. 11): Can I change an organization's permissions so that they can only view an application?

Answer:

Yes. You can specify actions in your resource-based policy that will limit the kinds of operations that can be performed on a shared application. The AWS Serverless Application Repository console and APIs support updating actions for a resource-based policy.


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Ques. 12): Does it cost anything to use the AWS Serverless Application Repository?

Answer:

In the AWS Serverless Application Repository, there is no cost to browse applications, deploy applications, or publish applications. For the resources consumed by the applications you deploy, standard AWS fees apply.

 

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Ques. 13): How do I administer serverless programmes installed on my account?

Answer:

The deployment of serverless apps as AWS CloudFormation stacks makes it simple for you to manage an application as a whole. The uniquely identifying Amazon Resource Name (ARN) for the application is associated with each resource, making it easier to find them in the AWS Tag Editor UI. To manage each resource independently, you can also leverage tools from AWS and other companies.

 

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Ques. 14): In my SAM template, how can I include a nested application?

Answer:

To add applications that you have created locally or that have been shared with you via the Serverless Application Repository, use the AWS:Serverless:Application resource type. Using straightforward AWS SAM terminology, you can specify inputs for the layered application or specify outputs as references.

 

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Ques. 15): I utilised a nested app from the Serverless Application Repository; how do I package it?

Answer:

You can utilise pre-packaged nested applications from the Serverless Application Repository. Before deploying the application in your account, you can check to see if nested apps are still accessible to you using the SAM CLI's existing sam package command.

 

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Ques. 16): Does the Serverless Application Repository allow me to publish nested applications?

Answer:

Yes. Similar to how you now publish standalone applications, you can publish nested applications to the Serverless Application Repository. To publish nested applications, use the Serverless Application Repository APIs, SAM CLI, AWS console, or AWS CLI.

 

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Ques. 17): Is it possible to share applications across all accounts in an AWS Organization?

Answer:

Yes. All accounts that are a part of an AWS Organization can now share applications. The same model as today's Lambda functions is employed by serverless applications. Using AWS IAM resource-based controls, access to serverless apps stored in the AWS Serverless Application Repository can be restricted. You can make your app accessible to the whole public, allow cross-account access, grant organisations access, or keep it private using policies.

 

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Ques. 18): Applications stored in the AWS Serverless Application Repository are licenced in what ways?

Answer:

Applications made publicly available by others may be made available under one or more open source license(s) accepted by the Open Source Initiative, while applications made available by AWS are available under the MIT open source licence (OSI). By selecting the licencing tab of an application on the AWS website, you can view licencing information.

 

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Ques. 19): The applications I add to the AWS Serverless Application Repository can be deployed by whom?

Answer:

Publishers have control over who can access the Repository and use their applications. An application can be shared with other accounts, have access restricted to your team (a group using the same AWS account), or be made open to all AWS users.

 

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Ques. 20): Is it possible for me to share an application with a certain organisational unit inside my company?

Answer:

Application sharing is not supported within a single organisational unit. You can make your app accessible to the whole public, allow cross-account access, grant organisations access, or keep it private using policies.


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