Introduction: In this post we are going to understand about Lambda function and different features of them. We will look all these things one by one. So before starting to Lambda we have to understand first about Serverless Architecture. Serverless Architecture: To understand what AWS Lambda is, we have to first understand what serverless architecture is all about. Serverless applications in general are applications that don’t require any provisioning of servers for them to run. When you run a serverless application, you get the benefit of not worrying about OS setup, patching, or scaling of servers that you would have to consider when you run your application on a physical server. Serverless applications or platforms have four characteristics: 1. No server management 2. Flexible scaling 3. No idle capacity 4. High availability Serverless applications have several components and layers: • Compute • API • Storage • Inter-process Messaging • Orchestration As a cloud provide