Top 25 AWS Lambda Interview Questions and Answers in 2022

AWS Lambda is an event-driven, serverless computing platform provided by Amazon as a part of Amazon Web Services. It is a computing service that runs code in response to events and automatically manages the computing resources required by that code. The product was introduced on November 13, 2014.

The Lambda service provides compute resources on an as-needed basis. Lambda executes code only when necessary, and scales computing resources automatically as required. Developers can write code, and Lambda will execute it when needed. As a result, developers are able to focus on coding instead of worrying about server provisioning and management.

To help you out, I have compiled a list of the top 25 AWS Lambda interview questions and answers. Whether you’re a Lambda beginner or an expert, this list will help you brush up on your knowledge and prepare for your next interview.

1. What Experience Do You Have With AWS Lambda?

I have experience with AWS Lambda since it was first released. I have used it for many tasks, from simple event processing to more complex tasks like building a chatbot. I have found Lambda to be easy to use and versatile and can accomplish many tasks with it.

In my experience, using AWS Lambda is an easy way to start with serverless computing. AWS Lambda lets you run code without worrying about the underlying infrastructure. It means that you can focus on your code and not on the infrastructure. It makes Lambda a great option for tasks you do not need to keep running all the time. For example, you could use Lambda to run tasks when your website is updated or when a customer signs in to your account. You can also use Lambda to run small tasks that you do not want to burden your main server.

2. What Is Your Understanding Of Lambda’s Architecture?

AWS Lambda is a computer architecture that allows developers to create and run code without having to provision or manage servers. Lambda is based on the AWS cloud, and it enables developers to run code in response to events, such as the completion of a task or the occurrence of an event. The Lambda architecture breaks down code into a series of functions, which are then run in response to an event. AWS Lambda functions are coded in the Python programming language, and they are executed on the AWS Lambda platform. AWS Lambda functions can be run from any device or platform, and it can be paused, restarted, or stopped at any time.

3. What Interests You About Lambda?

Amazon Lambda is a computing service that enables developers to create and run code without having to provision or manage servers. It is perfect for executing small code in response to events, such as when a sensor detects a change, a user logs in, or an e-commerce order is placed.

Lambda is also great for generating logs or notifications, polling servers for data, or running small tasks that do not require a full application server. With Lambda, you can run your code in the cloud, on demand, and with little to no management.

Because Lambda is a computing service, you can use it to run any code. You can use it to build simple applications, run big data applications, or create custom integrations with other services.

Lambda makes it easy to get started with computing, and there are plenty of resources available to help you get started. If you are just starting, we recommend reading our guide to getting started with Amazon Lambda.

Lambda is a great option for developers who want to create and run small pieces of code in response to events. It is perfect for executing small tasks that do not require a full application server, and with little to no management, it is an option for developers who want to run their code in the cloud.

I enjoy the flexibility and scalability of AWS Lambda. It is great to be able to quickly create and deploy small pieces of code without having to worry about the underlying infrastructure.

4. What Are Your Thoughts On The Potential Use Cases For Lambda?

In a nutshell, AWS Lambda is a platform that allows you to run code without having to provision and manage servers. You can use it to handle small tasks, like responding to an API call, or streaming data to a long-term storage service like S3.

Lambda enables you to quickly develop and deploy code without worrying about the underlying infrastructure. It makes it perfect for automating tasks or handling simple workloads.

Here are some potential use cases for AWS Lambda:

  • Machine Learning

Lambda makes it easy to deploy and manage machine learning models. You can use it to run custom algorithms in response to events or stream data to a service like Amazon Kinesis for analysis.

  • Security

Lambda can be used to respond to threats in real-time or to process data in bulk. It makes it a great way to automate security tasks like detecting and mitigating unauthorized access or responding to ransomware outbreaks.

  • API Management

Lambda can be used to manage and respond to API requests. It can be useful for automating tasks or responding to customer interactions.

  • Database

Lambda is used to run a small portion of a database in response to events. To handle common tasks or to develop APIs faster and easier, it can be useful.

  • Cloud-Based ETL

It is possible to automate common ETL tasks using Lambda. The platform is useful for building and deploying applications, as well as bulk data processing.

5. What Are The Benefits Of Using AWS Lambda?

There are plenty of reasons to use AWS Lambda, but here are a few of the most important:

  • Simplicity

Lambda is incredibly easy to set up and use. You can create a Lambda function in just a few minutes, and run it without ever having to leave AWS.

  • Flexibility

Lambda is versatile, and you can use it to run any code you want. You can use it to run small tasks or large applications, and you can even use it to automate complex processes.

  • Efficiency

Lambda is incredibly fast. You can run your code without worrying about Performance issues, and you can even use Lambda to run automated tasks in the background.

  • Security

Lambda is secure, and you can trust AWS to keep your data safe. Lambda functions run in an isolated environment, and you can easily limit access to your functions.

  • Cost Savings

Lambda is a cost-effective way to run your code, and you can save money by using it to run automated tasks or to run small tasks regularly.

6. What Are Some Common Tasks That Can Be Automated Using AWS Lambda?

There are a lot of tasks that can be automated using AWS Lambda. For example, you could create a function that automatically updates your AWS CloudFormation stack based on a change in your environment. You could also create a program that automatically sends notifications when AWS resources reach a certain threshold.

Or, you could create a function that automatically scales your Amazon Elastic Block Store (EBS) volumes according to your load. It would help to ensure that your EBS instances had enough capacity to handle future surges in traffic.

Whatever task you need to automate, there is probably a function. And, since AWS Lambda is a cloud-based service, it can be deployed quickly and easily. So, whether you need to create a simple program or something more complex, AWS Lambda can help you get the job done.

7. How Can Lambda Be Used To Speed Up The Development Process?

One way that AWS Lambda can be used to speed up the development process is by allowing developers to write code in a more agile manner. Lambda enables developers to quickly create and deploy small functions without worrying about the underlying infrastructure or scalability. Additionally, Lambda can allow developers to test their code before deploying it to production to ensure it meets all requirements.

8. What Are Some Common Challenges That Are Faced When Using AWS Lambda?

The first challenge is understanding the Lambda function. It can be challenging because the program is written in a different language than the user is used to. Additionally, the Lambda function can be complex and require a lot of code.

The second challenge is understanding the platform. AWS Lambda is a powerful tool, but it needs the knowledge to use correctly. It can be difficult for new users or those unfamiliar with cloud computing.

The third challenge is understanding the pricing. AWS Lambda is a powerful tool, but it can be expensive. It can be a barrier to entry for users who are not familiar with cloud computing.

The fourth challenge is understanding security. AWS Lambda is a powerful tool but could be vulnerable to attacks. Users unfamiliar with security risks may find it a barrier to entry.

Overall, the challenges faced when using AWS Lambda are common barriers to entry for unfamiliar users with cloud computing. However, with the help of a knowledgeable provider, it is possible to overcome these challenges.

9. How Can Lambda Be Used To Improve The User Experience On a Website Or Application?

Some tasks can be automated using Lambda to improve a website or application’s user experience. Lambda handles requests, responds to user interactions, and sends notifications. It can make the user experience more seamless and improve the overall experience on the website or application.

10. What Are Some Common Issues That Are Encountered When Deploying AWS Lambda Applications?

Many common issues can arise when deploying AWS Lambda applications.

One of the most common issues is that Lambda functions may not be able to access the necessary resources needed to run. It can occur by several factors, including insufficient permissions, inappropriate configuration, and missing dependencies.

Another common issue is that Lambda functions can be slow or stop working altogether. It can occur by several factors, including insufficient memory, poor performance, and outdated or mismatched dependencies.

Finally, it is essential to remember that Lambda functions are not always reliable. It can happen by several factors, including unexpected errors, intentional sabotage, and poor configuration.

11. What Types Of Programming Languages Are Supported By AWS Lambda?

AWS Lambda is a serverless computing platform that enables developers to build, deploy, and run code without worrying about the underlying infrastructure. AWS Lambda supports many programming languages, including Java, Python, and Node.js. It makes it perfect for developing and deploying custom applications.

12. What Are Some Tips For Debugging And Troubleshooting AWS Lambda Applications?

Debugging and troubleshooting AWS Lambda applications can be a daunting task. However, with a little effort, it can be made much easy. Here are a few tips for getting started:

  • Try to reproduce the issue in a lab environment before debugging it in the live system. It will help you isolate and pinpoint the problem.
  • Use the AWS Lambda console to get information about your Lambda function and its executions. The console can help you see the Lambda function’s status, the logs from executions, and the metrics from the underlying AWS infrastructure.
  • Use the AWS Lambda logs to track down the source of the issue. The data can help you understand what happened in the context of the Lambda function executions.
  • Use the AWS Lambda console to troubleshoot Lambda functions. The console provides tools that can help you diagnose problems with your Lambda function.

13. How Do You Scale AWS Lambda Applications?

There are a few ways to scale AWS Lambda applications.

One way is to simply increase the number of Lambda instances you are running. It is done by adding more resources to your AWS account, or by using a cloud provider that provides more Lambda capacity.

Another way to scale your Lambda applications is to use a Lambda function distribution model. This model allows you to create several copies of your Lambda function and distribute them across different AWS accounts. This way, you can scale your Lambda applications by adding more users to your distribution.

Finally, you can use AWS Lambda annotations to scale your Lambda functions. This feature allows you to attach certain conditions to your Lambda function executions, that can trigger actions such as adding more servers to your deployment or scaling up your Lambda function.

14. What Are Some Tips For Optimizing AWS Lambda Applications?

Lambda is great for creating quick, on-demand code. But like anything else, Lambda apps can be optimized to improve performance. Here are some tips to help you get the most out of your Lambda applications:

  • Minimize the number of calls to the AWS Lambda function. It will reduce the amount of processing time and memory required by the Lambda function.
  • Use the correct AWS Lambda function for the task at hand. For example, use the Lambda function for calculation tasks instead of the Lambda function for sending emails.
  • Optimize the code of the Lambda function. It will reduce the time it takes to run and the amount of memory required by the Lambda function.
  • Use the AWS Lambda Istanbul tool to diagnose and optimize the code of your Lambda function.

15. How Have You Used Lambda To Achieve Success In Your Previous Roles?

I have been using AWS Lambda for some time now and have found it to be a valuable tool in my previous roles. Lambda is a powerful platform that allows you to deploy small, isolated pieces of code without worrying about the underlying infrastructure. It allows me to quickly develop and deploy new features without worrying about the underlying infrastructure. Lambda’s ability to run code in response to specific events makes it an ideal platform for streaming data and handling events. I have found that Lambda is a tool for quickly developing and deploying new features, and I would recommend it to anyone looking for a lightweight platform for deploying code.

16. What Are Some Commonly Used Amazon Lambda Resources?

Some resources I find helpful when working with AWS Lambda are.

  • Using Amazon AWS Lambda, you can run code in response to events from S3, DynamoDB, API Gateway, and Amazon S3, and create and manage your custom events.
  • In addition, you can use Lambda to run code in response to events from other Amazon AWS services, such as CloudWatch and Kinesis.
  • Using Amazon AWS Lambda, you can run code in response to events triggered by other applications. For example, you can run code in response to a mobile app or a web application.
  • Fourth, Lambda allows you to run code in response to events produced by other machines, such as machines in another AWS region or remote machines.
  • Lambda is also capable of running code in response to events from applications running in different languages. For example, you can run code in response to events from Java or NodeJS applications.

17. How Do You Migrate Existing Applications To AWS Lambda?

Migrating an existing application to AWS Lambda can be a daunting task. Planning and preparation, however, can make the process easier. To implement Lambda functions, the first step is to determine which functionality the application currently provides. After this, it is necessary to create a blueprint for the application that includes information on the Lambda function code, runtime environment, and required dependencies. After the blueprint is complete, creating the Lambda function and configuring it with the necessary permissions and settings is required. Finally, it is essential to test the function to ensure that it is working as expected.

18. What Do You Think Sets AWS Lambda Apart From Other Cloud-Based Application Platforms?

AWS Lambda is a powerful cloud-based platform that allows developers to quickly create and deploy cloud-based applications without having to write code. Lambda is unique in that it allows developers to run code without having to provision or manage servers. This makes Lambda a great choice for cloud-based applications that require low-level processing, such as voice recognition, natural language processing, and image recognition. Additionally, Lambda is affordable and easy to use, making it a great option for small businesses and development teams.

19. What Inspired You To Pursue a Career In AWS Lambda?

I have always loved technology and the ease of using it to solve problems. When I was first introduced to AWS Lambda, I knew this was the right career for me. I love the flexibility and ability to quickly create and deploy code without having to worry about the underlying infrastructure. I also love the ease of integrating AWS services into my existing applications.

20. Is Lambda a Good Fit For Mobile Apps?

I was always passionate about technology and I loved learning new things. I remember when I first heard about AWS Lambda and its potential to power next-generation applications. I was blown away by the possibilities and I knew that I had to pursue a career in AWS Lambda.

AWS Lambda is a powerful tool that can help you quickly create and deploy reactive applications. It allows you to create code that is executed in response to events, which means that you can quickly respond to changes in your application.

I love how AWS Lambda can help me quickly create and deploy new applications. It allows me to focus on necessary code and leaves the rest of the work to AWS. I know that I can trust AWS Lambda to deliver on its promises, which is why I am so excited about the future of AWS Lambda.

21. How Do You View The Potential Use Of Lambda In Big Data Scenarios?

Lambda is a great fit for mobile apps! Lambda provides various features that make developing and deploying mobile apps easier. Lambda also enables you to quickly create, test and deploy mobile apps without worrying about the underlying infrastructure.

22. In Terms Of Fuzz Testing, How Would You Use Lambda?

Fuzzing is a technique used to test an application by injecting invalid data. This data can come in the form of requests or packets. By injecting invalid data, you can check the application’s responses.

Lambda is a great tool for fuzzing because it can quickly deploy small, single-purpose applications. You can also use Lambda’s error reporting features to track down the source of errors.

Using Lambda functions, we will first test how the application processes requests. We will use a rejection handler to test how the application responds to rejections.

We will then fuzz the application’s response handling by using a Lambda function that accepts a POST request and processes it. We will use a custom response handler to test the application’s response.

As a final step, we will test the application’s database interaction. We will use a Lambda function to accept a POST request and to interact with the database.

23. Do You See Lambda As a Potential Machine Learning Tool?

Yes, I see AWS Lambda as a potential machine-learning tool. AWS Lambda makes it easy to deploy machine learning models on the cloud, and the platform offers a variety of features that make it a great choice for prototyping and testing models.

Lambda is simple to use, and you can quickly get started training your machine-learning models. You can also use Lambda to run your models on-demand, so you can quickly answer questions or solve problems.

Lambda makes it easy to scale your machine-learning models up or down as needed. You can also use Lambda to run your models in batch mode, so you can easily manage and monitor your machine learning projects.

24. What Are Your Thoughts On Lambda’s Potential Use In Streaming Processing?

AWS Lambda has the potential to revolutionize streaming processing. It helps developers quickly create and deploy small, incremental processing tasks that run in response to events or changes in data.

The Lambda functions process events in real-time or batch processing tasks that can be run at scheduled times. That is used to process data from any source, including Amazon S3, Amazon Kinesis, and Amazon DynamoDB.

Lambda functions are written in the popular Python language and can be run on the AWS cloud. It is possible to process data in response to events or changes in data or process data in bulk.

25. How Can Lambda Be Used In Other Cloud Infrastructure Scenarios?

AWS Lambda is a platform service that makes it easy to create and deploy code in the cloud. You can use Lambda to run small pieces of code, called functions, in response to events, such as a new message in an Amazon SNS topic, a change in an S3 bucket, or a push notification from an Amazon CloudWatch alarm.

Lambda is perfect for running small pieces of code, like a function that processes new messages in an Amazon SNS topic. With Lambda, you can create a function that runs in seconds, without needing to provision or manage servers. And because Lambda functions are self-contained and run in the cloud, you can deploy them to any Amazon Web Services Region.

You can also use Lambda to power your cloud-based applications. For example, you can use Lambda to process new messages in an Amazon SNS topic or to trigger a CloudWatch alarm. You can also use Lambda to power your applications, by programming it to do tasks like processing new messages, managing resources, or archiving data.

Conclusion

Although AWS Lambda is a relatively new service, it has quickly become a popular choice for developers looking to build serverless applications. In this article, I have compiled a list of the top 25 AWS Lambda interview questions and answers to help you prepare for your next interview. I hope you found these questions and answers helpful.