AWS Lambda consists of three main components that enable serverless execution: Function, Event Source, and Execution Environment.

  1. Function – This is the actual code that runs in response to an event. It can be written in Python, Node.js, Java, or other supported languages.

  2. Event Source – Lambda triggers functions based on events from sources like S3, API Gateway, DynamoDB, or CloudWatch.

  3. Execution Environment – AWS provides a managed runtime for executing functions, ensuring automatic scaling and security.

These components allow businesses to run scalable, event-driven applications without managing infrastructure.

Key takeaways:

  • Function: The code executed by AWS Lambda.

  • Event Source: The AWS service that triggers Lambda functions.

  • Execution Environment: The runtime that manages scaling and security.

  • AWS Lambda enables serverless computing for real-time applications.

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