November 05, 2022

Top 20 AWS Serverless Application Model(SAM) Interview Questions and Answers


            An open-source framework for creating serverless apps is the AWS Serverless Application Model (SAM). It offers a concise syntax for expressing functions, APIs, databases, and mappings of event sources. You may create and model the application you want using YAML with just a few lines per resource. You can create serverless apps more quickly since SAM extends and translates the SAM syntax into AWS CloudFormation syntax during deployment.

 

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Ques: 1). What is AWS SAM, or AWS Serverless Application Model?

Answer:

An open source framework for creating serverless apps is called AWS Serverless Application Model (AWS SAM). It offers a concise syntax for expressing functions, APIs, databases, and mappings of event sources. You use YAML to represent the application you want and just need a few lines to declare each resource.


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Ques: 2). How do we begin developing apps based on SAM?

Answer:

Use the AWS SAM CLI to begin developing SAM-based apps. You may locally create, test, and debug apps specified by SAM templates or by using the AWS Cloud Development Kit thanks to SAM CLI's Lambda-like execution environment (CDK). You can also design secure continuous integration and deployment (CI/CD) pipelines that adhere to best practises and interface with both AWS's built-in and external CI/CD systems using the SAM CLI to deploy your apps to AWS.

Under the Apache 2.0 licence, SAM and the SAM CLI are open-sourced. You may add updates and new features to SAM via GitHub, as well as SAM CLI.

 

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Ques: 3). How much does it cost to utilise AWS SAM?

Answer:

The use of AWS SAM is free of charge. The same way you would if you had created the AWS resources manually, you pay for those produced through SAM. Only what you use, as you use it, is charged. There are no minimum costs or up-front obligations.


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Ques: 4). AWS SAM is it open-source?

Answer:

Under the Apache 2.0 licence, AWS SAM and the SAM CLI are open-sourced. AWS SAM on GitHub and the AWS SAM CLI on GitHub both accept contributions for new features and improvements.


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Ques: 5). A SAM template: what is it?

Answer:

The architecture of a serverless application is represented by a SAM template file, which is a YAML configuration. You specify all of the AWS resources that are a part of your serverless application using the template. Any resource that you may declare in an AWS CloudFormation template can also be declared in an AWS SAM template since AWS SAM templates are an extension of AWS CloudFormation templates.


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Ques: 6). What is the AWS SAM CLI capable of?

Answer:

A command-line interface that facilitates the development of SAM-based apps is the AWS SAM CLI. You may deploy your serverless application to the AWS Cloud, generate a deployment package for it, and run Lambda functions locally using the AWS SAM CLI.

 

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Ques: 7). How is AWS SAM put to use?

Answer:

To express functions, APIs, databases, and event source mappings, AWS SAM offers shorthand syntax. SAM extends and translates the SAM syntax into AWS CloudFormation syntax during deployment. After that, CloudFormation assigns dependable deployment capabilities to your resources.


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Ques: 8). AWS SAM CLI: What is it?

Answer:

You may locally develop, test, and debug serverless applications specified by AWS SAM templates using the SAM Command Line Interface (CLI). SAM CLI offers a local execution environment similar to Lambda and aids in problem detection.

 

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Ques: 9). How can I begin using AWS SAM?

Answer:

Install the AWS SAM CLI, and then use the sam init command to create a pre-configured AWS SAM template with example application code to get started with SAM.


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Ques: 10). Which languages can I use with AWS SAM?

Answer:

Any runtime that is supported by AWS Lambda may be used to develop serverless apps using AWS SAM. Additionally, you may locally debug Lambda functions created in Node.js, Java, Python, and Go using the SAM CLI.

 

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Ques: 11). How can I set up the AWS SAM CLI?

Answer:

Pip may be used to install AWS SAM CLI on Linux, Mac, or Windows.

 

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Ques: 12). AWS SAM is supported by which AWS regions?

Answer:

All areas where AWS Lambda is offered also provide AWS SAM. You can consult the AWS Lambda region table that is accessible.

 

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Ques: 13). What kinds of commands can the SAM CLI execute?

Answer:

A increasing number of commands are supported by SAM CLI. The sam init command creates sample application code in the language of your choosing together with pre-configured AWS SAM templates. By running your function code locally in an execution environment similar to Lambda, the sam local command facilitates local invocation and testing of your Lambda functions and SAM-based serverless apps. The sam local command may also be used to create test payloads locally, launch a local endpoint for API testing, or automate Lambda function testing. You may combine your application code and dependencies into a "deployment package" and then deploy your serverless application to the AWS Cloud using the sam package and sam deploy commands. Finally, the sam logs command enables you to fetch, tail, and filter logs for Lambda functions.



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