Definition
AWS Lambda is a serverless, event-driven compute service that runs your code in response to events and automatically manages the underlying compute resources. You simply upload your code and Lambda takes care of everything required to run and scale your code with high availability, from infrastructure provisioning to code monitoring. This serverless approach allows developers to focus on writing code without worrying about server management, leading to faster development cycles and reduced operational overhead. For instance, Lambda can be used to process image uploads, triggering a function to resize images automatically. Unlike traditional virtual machines or containers that require continuous management, Lambda functions execute only when triggered, making them highly cost-effective for sporadic workloads. This service is frequently tested on AWS certification exams like the AWS Certified Solutions Architect Associate.