April 18, 2022

Top 20 AWS Amplify Interview Questions and Answers

 

        AWS Amplify is a collection of tools (open source framework, visual development environment, console) and services (web app and static website hosting) for developing mobile and web apps on AWS.

Amplify Studio makes backend and frontend UI setting even easier with a visual point-and-click interface that integrates with the Amplify CLI. Amplify Studio also has management tools for app content and users. AWS Amplify also provides a fully managed web app and static website hosting solution, which allows you to host your front-end web app, create/delete backend environments, and set up CI/CD on both the front end and backend.

Finally, you can utilise AWS Device Farm to test apps on real iOS, Android, and web browsers as part of the broader set of front-end web and mobile development tools and services.


Ques. 1): What is AWS Amplify, and how does it work?

Answer:

To develop an app backend and link it with your iOS, Android, Web, and React Native apps, Amplify's open source framework contains an opinionated set of libraries, UI components, and a command line interface (CLI). The framework makes use of a core set of AWS Cloud Services to provide high-scale features such as offline data, authentication, analytics, push notifications, and bots.


Ques. 2): What is the price of using AWS Amplify?

Answer:

You only pay for the AWS services you use when you use Amplify's open source framework (libraries, UI components, CLI) or Amplify Studio. There are no additional fees associated with the use of these tools. Visit the AWS Amplify pricing page to learn more about AWS Amplify Hosting, Amplify's fully managed web app and static website hosting service. Visit the AWS Device Farm pricing page to learn more about AWS Device Farm pricing.

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Ques. 3): What is the relationship between AWS Amplify and the AWS Mobile SDKs for iOS and Android?

Answer:

Whether you've configured AWS services with the Amplify CLI or not, Amplify iOS and Amplify Android are the preferred ways to build iOS and Android apps that use them.

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Ques. 4): What happened to Amazon Web Services' Mobile Hub?

Answer:

Customers who already have an AWS Mobile Hub account can continue to use it. Instead, developers should use AWS Amplify for new projects.

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Ques. 5): What can I do with Amplify Studio, the CLI, and the libraries?

Answer:

With the Amplify libraries, you can add offline data, multifactor authentication, analytics, and other features to your app with just a few lines of code. With intuitive guided workflows, you can configure underlying cloud services such as AWS AppSync, Amazon Cognito, Amazon Pinpoint, AWS Lambda, Amazon S3, or Amazon Lex directly from the Amplify CLI or Amplify Studio, reducing the time it takes to set up and manage your backend services.

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Ques. 6): What languages and platforms are supported by Amplify libraries?

Answer:

Apps for iOS, Android, Web, Flutter, and React Native are all supported by the Amplify library. Deep integration with React, Ionic, Angular, and Vue.js is available for Web apps.

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Ques. 7): What is the web hosting service provided by AWS Amplify?

Answer:

AWS Amplify offers a fully managed hosting solution for web apps and static webpages that can be accessed directly from the AWS dashboard, in addition to its development tools and features. The static web hosting service from AWS Amplify offers a complete workflow for developing, deploying, and hosting single-page web apps or static webpages with serverless backends. Continuous deployment allows developers to push updates to their web project with every Git commit. The app is deployed and hosted on an amplifyapp.com subdomain after the build is complete. To begin getting production traffic, developers can connect their custom domain.

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Ques. 8): What is Amplify Studio, and how does it work?

Answer:

Outside of the AWS console, Amplify Studio is a visual tool for setting and maintaining app backends and designing frontend UIs. Amplify Studio allows both developers and non-developers to manage app content and users after it has been deployed.

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Ques. 9): What is the relationship between AWS Amplify hosting and Amplify's open source framework?

Answer:

AWS Amplify is a set of tools (including an open source framework and a graphical programming environment) as well as a fully managed web hosting solution. The framework's tools (libraries, UI components, and the CLI), as well as Amplify Studio, the console, and the static web hosting service, can all be used together or separately.

You can utilise the AWS dashboard to deploy and host Single Page App (SPA) frontends and static webpages, regardless of whether they require Amplify libraries.

AWS Amplify's static web hosting service provides additional capabilities if you're using the Amplify CLI to configure backend resources for your app. Before deploying your front end, AWS Amplify prepares or upgrades these backend resources on each check-in. When you utilise AWS Amplify's web hosting service, you may create a range of options, such as isolated backend deployments per branch or shared backend deployments across branches.

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Ques. 10): What elements of Amplify work with AWS cloud services?

Answer:

Offline data, multi factor authentication, analytics, and other Amplify features are organised based on the use cases you need to integrate with your app. The appropriate AWS cloud services are provisioned for you when you configure these features using the Amplify CLI or the Amplify Studio. The setup is saved in CloudFormation templates, which can be shared with other developers and checked into source control. When you use the Amplify libraries to add these functionalities to your app, the library makes the appropriate calls to AWS services. 'Amplify add analytics,' for example, will set up Amazon Pinpoint. Then, when you utilise the Amplify library's Analytics APIs in your app, the necessary calls will be made to Pinpoint.

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Ques. 11): What is the best way to get started with AWS Amplify web hosting?

Answer:

To get started, go to the AWS interface and connect your source repository to AWS Amplify. AWS Amplify detects the front-end framework and develops and delivers the app to a globally available content delivery network (CDN). Amplify can detect backend functionality introduced using the Amplify CLI or Amplify Studio and deploy the relevant AWS resources with the front end. AWS Amplify will instantly develop and deploy your web app, as well as host it on a global content delivery network (CDN) with a friendly URL (for example, https://master.appname.amplifyapp.com). Go to AWS Amplify in the AWS console to get started.

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Ques. 12): What is the difference between the Amplify Studio and the Amplify console?

Answer:

Within the AWS administration dashboard, the Amplify console serves as the command centre for your app. The AWS Amplify console displays all of the front-end and backend environments for your apps, whereas Amplify Studio has a separate instance for each backend environment.

The Amplify interface is where you can set up web hosting, full-stack CI/CD, add a custom domain, clone/delete multiple backend environments, and go to underlying AWS service consoles with AWS Amplify's fully managed web hosting solution. Amplify Studio, on the other hand, is used to configure and maintain the app backend, including adding features like authentication, data, and functions. After launching your app, the Amplify Studio also gives non-developers (QA, PMs) a way to manage app content and users.

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Ques. 13): Is it possible to use the Amplify libraries without using the CLI?

Answer:

Yes. The libraries can be used to access backend resources generated before the Amplify CLI was available.

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Ques. 14): What kinds of web applications can I create and deploy?

Answer:

AWS Amplify offers a fully managed static web hosting solution for web apps and static webpages that can be accessed directly from the AWS dashboard, in addition to its development tools and capabilities. The static web hosting service from AWS Amplify offers a complete workflow for developing, deploying, and hosting single-page web apps or static webpages with serverless backends. Continuous deployment allows developers to push updates to their web project with every Git commit. The app is deployed and hosted on an amplifyapp.com subdomain after the build is complete. To begin getting production traffic, developers can connect their custom domain.

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Ques. 15): What is the purpose of Amplify Studio being outside of the AWS console?

Answer:

Amplify Studio is available outside of the AWS console to allow front-end developers who are new to AWS to interact with AWS products more quickly and efficiently. Amplify Studio simplifies the elements required to create a cloud-connected online or mobile app, including both the backend and frontend user interface. Non-developers (QA testers, PMs) may manage the app's content and users with ease, without requiring developers to figure out the appropriate IAM roles and policies.

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Ques. 16): What is a 'app' in AWS Amplify?

Answer:

Your project container is an AWS Amplify 'app.' A list of branches you've connected from your source repository is included in each app project. From your app project, you may connect extra feature branches, a custom domain, and view your build logs.

 

Ques. 17): What do you understand by continuous deployment?

Answer:

Continuous deployment is a DevOps method for software releases in which each code commit to a repository is pushed to production or staging automatically. By guaranteeing that your hosted web app is constantly a representation of the latest code in your repository, this approach lowers time to market.

 

Ques. 18): Do my Git access tokens get stored by AWS Amplify web hosting?

Answer:

Access tokens from repositories are never stored by AWS Amplify. We obtain an access token from your source provider after you approve AWS Amplify. We simply provide the token to our console, and all subsequent interactions with the GitHub API is done entirely through the browser. The token is permanently deleted after configuring continuous deployment.

 

Ques. 19): What are the different types of environmental variables? What am I going to do with them?

Answer:

Environment variables are runtime configurations that apps require. Database connection information, third-party API keys, and various customisation settings and secrets are all possible options. The best approach to make these settings visible is to use environment variables. When building an app or in the app settings, you can add environment variables. To prevent unauthorised access, all environment variables are encrypted. Fill in the key and value textboxes with all of your app's environment variables. When you connect a new branch to AWS Amplify, the environment variables are automatically applied across all branches, so you don't have to re-enter them. After you've entered all of the variables, click Save.

 

Ques. 20): What happens when you run a build?

Answer:

AWS Amplify will build a temporary compute container (4 vCPU, 7 GB RAM), download the source code, execute the project's commands, deploy the created artefact to a web hosting environment, and then destroy the compute container. AWS Amplify will send the build output to the service console during the build.

 

 

 


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