AWS Cloud Development Kit - From Beginner to Professional - Serverless: Lambda Source Assets from S3

This video tutorial covers building AWS Lambda functions using source code stored in an S3 bucket. It explains the process of setting up an S3 bucket, uploading code, and configuring the Lambda function to use this code. The tutorial also demonstrates how to import the S3 bucket into a stack, build the Lambda function, and configure settings such as the handler and log retention. Finally, it shows how to test the deployment and verify the function's operation in the AWS console.

Why might you need to use source code from an external location for AWS Lambda functions?

• To reduce the size of the Lambda function

• To handle dependencies from third-party libraries

• To ensure code is always up-to-date

• To avoid using third-party libraries

What is the first step in deploying a Lambda function with code from S3?

• Set up an S3 bucket and upload the code as a zip file

• Upload the code directly to the Lambda function

• Create a new Lambda function in the AWS console

• Write the code in the AWS Lambda editor

What is the purpose of zipping the source code before uploading it to S3?

• To reduce the file size

• To ensure compatibility with AWS Lambda

• To package the code and its dependencies together

• To encrypt the code for security

How do you specify the source code location for a Lambda function in the CDK stack?

• By using a local file path

• By linking to a GitHub repository

• By writing the code directly in the CDK stack

• By providing the S3 bucket name and key

What is a key consideration when setting the handler for a Lambda function using a zip file?

• The handler must be a compiled binary

• The handler must be named 'index.handler'

• The handler must be written in Java

• The handler must be specified with the correct path inside the zip

What is the default retention period for Lambda logs, and how can it be changed?

• Logs are retained for one week by default and can be extended

• Logs are retained for a very long time by default and can be shortened

• Logs are retained for one day by default and can be extended

• Logs are retained indefinitely and cannot be changed

What should you verify after deploying a Lambda function with code from S3?

• That the Lambda function is correctly picking up the code from S3 and the log retention is set

• That the Lambda function is using the default execution role

• That the Lambda function is running in the correct AWS region

• That the Lambda function is using the latest version of the code