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AWS Lambda

Compute service that runs code in response to events

AWS Lambda is a serverless compute service that lets you run code without provisioning or managing servers. Lambda runs your code only when requested, scaling automatically, from a few requests per day to thousands per second.
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AWS Lambda is a serverless compute service that runs your code in response to events and automatically manages the underlying compute resources. It's a key component of AWS's serverless architecture offering. Lambda functions execute code when triggered by events from AWS services like S3, DynamoD…

Concepts covered: Lambda@Edge, Lambda Layers, Provisioned Concurrency, AWS Lambda Permission Model, Event-driven architecture, Function execution model, Lambda function limitations, Cold start and warm start, Lambda Triggers, Function Versioning and Aliases

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AWS Certified Solutions Architect - AWS Lambda Example Questions

Test your knowledge of AWS Lambda

Question 1

Which AWS service can be used to trigger an AWS Lambda function when an object is uploaded to an S3 bucket?

Correct Answer: S3

S3 is an event source for AWS Lambda and can be used to trigger an AWS Lambda function when an object is uploaded to an S3 bucket.

Question 2

What is an AWS Lambda layer?

Correct Answer: An AWS Lambda layer is a deployment package that contains libraries, custom runtimes, and other function dependencies that you can use in your Lambda function. Layers let you manage your in-development function code independently from the unchanging code and resources that it uses.

An AWS Lambda layer is a deployment package that contains libraries, custom runtimes, and other function dependencies that you can use in your Lambda function. Layers let you manage your in-development function code independently from the unchanging code and resources that it uses.

Question 3

Which statement best describes a trigger in AWS Lambda?

Correct Answer: An event source that automatically invokes an AWS Lambda function when the event occurs (for example, an S3 object upload, a DynamoDB stream record, an HTTP request via Amazon API Gateway, or an Amazon EventBridge schedule).

In AWS Lambda, a trigger is any configured event source that causes the Lambda service to invoke your function when that event happens. Triggers can come from many AWS services and integrations, such as object uploads to Amazon S3, item updates in DynamoDB Streams, HTTP requests via Amazon API Gateway, or time-based rules in Amazon EventBridge. A trigger is not limited to direct user input, nor is it only a scheduled task; both of those are just examples of event sources. It is also not a security mechanism.

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