AWS Lambda interview questions, see some of the most commonly asked AWS Lambda interview questions and answers. AWS Lambda is a serverless compute service. You can learn more about AWS Lambda here.
Top 10 AWS Lambda interview questions
Basic AWS Lambda Interview Questions
What is AWS ? And what is AWS Lambda?
AWS is Amazon Web Services which is one of the most popular and widely used cloud provider AWS provides a lot of services, one of them is AWS Lambda. AWS Lambda is the serverless compute service offered by AWS. Read More AWS Lambda here.
Why we need AWS Lambda function?
It allows you to add custom logic to AWS resources such as Amazon S3 buckets and Amazon DynamoDB tables, therefore you can easily apply to compute the data processing on the cloud. With AWS Lambda, you can focus on code rather than managing the infrastructure like servers and its resources.
What are the advantages of using AWS Lambda ?
AWS Lambda Provides a lot of advantages/features like Server Management, Auto Scaling, logging, security, etc. Check this post for advantages in detail.
When not to use AWS Lambda?
There are certain use cases/ disadvantages based on that we can decide not to go with AWS Lambda, check here.
When use AWS Lambda?
There are certain use cases/advantages based on that we can decide to go with AWS Lambda, check here.
Advanced Lambda interview questions
Explain Event Driven Architecture.
Event driven architecture uses events to trigger and communicate between services. It is an architecture paradigm of the production, detection and reaction to events. Event is a change of a state e.g. adding an item in a shopping cart, removing it, all these are the events.
What are the different Runtime is supported by Lambda ?
AWS Lambda supports various runtime. Please check here.
What are the events that triggers Lambda function?
Lambda function gets triggered on various events like: Amazon SNS (Simple Notification Service), Amazon S3 (Simple Storage Service), Amazon SES (Simple Email Service), Amazon SQS (Simple Queue Service), Amazon CloudFormation, Amazon CloudWatch logs, Amazon eventBridge, AWS CodeCommit, AWS config, etc.
How long can an AWS Lambda function executes ?
AWS Lambda functions can be configured to run up to 15 minutes per execution. You can set the timeout to any value between 1 second and 15 minutes.
How to store AWS Lambda logs?
For storing logs, we can use create S3 bucket and store the logs. You can do it via code as well as direct on console, Open the CloudWatch console at console.aws.amazon.com/cloudwatch/
In the navigation pane, choose Log groups. On the Log Groups screen, choose the name of the log group. Choose Actions, export data to Amazon S3.
FAQ on AWS Lambda
AWS Lambda is an Amazon Web Services (AWS)
It is a serverless computing service designed to let developers run code without managing or configuring servers. Recently, AWS Lambda has received considerable interest and many developers want more details. This article intends to answer commonly asked questions regarding AWS Lambda.
What Is AWS Lambda?
Amazon AWS Lambda is a serverless computing service that enables developers to respond instantly to events, such as changes in an Amazon S3 bucket, updates to DynamoDB tables or Amazon Kinesis data streams. Programmers can write code using any programming language of their choosing without managing infrastructure for deployment purposes.
How Does AWS Lambda Work?
AWS Lambda follows a straightforward process. First, developers write code for their Lambda function before creating a deployment package with all dependencies and dependencies required by it. Next, these packages are uploaded directly into AWS Lambda for execution.
As soon as an event takes place, AWS Lambda automatically runs function code while allocating resources as required. It does this within an environment managed and maintained by AWS that automatically destroys containers when function completion occurs and charges only for time expended by developer.
What are the Benefits of Utilizing AWS Lambda?
Utilizing AWS Lambda has many advantages, including:
Reduced infrastructure management: Developers can focus on writing code rather than administering servers or infrastructure. AWS Lambda automatically scales to handle any increase or decrease in traffic or workload.
Pay-per-use pricing: Developers only pay for the time their function runs rather than for idle resources. AWS Lambda supports multiple programming languages including Node.js, Java, Python and Go.
Integrating AWS Lambda With Other Services:
AWS Lambda can easily integrate with other AWS services, including Amazon S3, DynamoDB, and Kinesis.
Which programming languages does AWS Lambda Support?
Whilst AWS Lambda currently supports several programming languages including C, Java, C# etc it may become available soon as well.
Node.js, Java, Python, C# Go and Ruby all support Lambda functions with maximum execution times of 15 minutes – any time an action exceeds this period AWS Lambda automatically terminates it.
What Does AWS Lambda Cost?
Pricing for AWS Lambda depends on both the number of requests for the function and the duration of its execution time. For the first 1 million requests in any month are free; after that, $0.20 per 1 million requests is the charge made against AWS; function execution duration costs $0.00001667 per GB-second.
