AWS Serverless Microservices with Patterns and Best Practices - AWS Lambda Function Code

The video tutorial provides an in-depth look at AWS Lambda, covering its lifecycle, key concepts, and best practices. It explains how Lambda functions are invoked, the importance of runtime and handler methods, and the role of events and execution environments. Advanced topics like layers, concurrency, and destinations are discussed, along with best practices for optimizing Lambda functions, such as using environment variables and resource-based policies.

What is the primary role of the event object in a Lambda function?

• To handle errors in the function

• To manage database connections

• To provide information about the event that triggered the function

• To store runtime configuration

Why is it recommended to separate business logic from the handler method in a Lambda function?

• To ensure the handler method only includes business logic

• To increase the number of concurrent executions

• To improve code readability

• To reduce the size of the deployment package

What is a trigger in the context of AWS Lambda?

• A JSON document containing event data

• A method to handle errors in Lambda

• A resource that provides additional code for Lambda

• A configuration that invokes a Lambda function

What is the purpose of Lambda layers?

• To store event data in JSON format

• To provide a secure runtime environment

• To package libraries and dependencies for Lambda functions

• To manage concurrent executions

How does AWS Lambda handle concurrency?

• By queuing requests until the function is free

• By provisioning new instances for each concurrent request

• By using a single instance for all requests

• By limiting the number of requests per second

What is the role of a destination in AWS Lambda?

• To handle synchronous invocations

• To store runtime configuration

• To send events from asynchronous invocations

• To manage database connections

Which of the following is a best practice for managing AWS Lambda lifecycles?

• Avoid using environment variables

• Minimize deployment package size

• Store secrets in the code

• Use a single execution role for all functions