Features of Lambda@Edge in AWS

Answer - C.

Option A is incorrect as it is not used for Edge-based programming.

Option B is incorrect because edge locations are part of the CloudFront setup, not S3.

Option C is CORRECT because Lambda@Edge allows you to run Lambda functions at the AWS edge locations in response to CloudFront events.

Without Lambda@Edge, customized processing requires requests to be forwarded back to compute resources at the centralized servers.

This slows down the user experience.

Option D is incorrect because Lambda@Edge supports only Node.js, which is a server-side JavaScript framework.

For more information on Lambda@Edge, please visit the link:

http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/what-is-lambda-at-edge.html

Lambda@Edge is a service provided by AWS that allows developers to run AWS Lambda functions at AWS Edge locations, specifically at the edge locations of the Amazon CloudFront content delivery network.

The correct answer is C. It is used for running Lambda functions at edge locations used by CloudFront.

When a user requests content from an AWS CloudFront distribution, the content is served from the CloudFront edge location closest to the user. With Lambda@Edge, developers can add custom logic to CloudFront by writing and deploying AWS Lambda functions that are triggered by CloudFront events such as viewer requests, origin requests, and response generation.

Lambda@Edge provides a range of benefits, including reducing network latency by moving computation closer to the user, improving application security, and reducing infrastructure costs by only running the code when needed.

Lambda@Edge supports any programming language that can be run within an AWS Lambda function, including Node.js, Python, Java, Go, and C#. However, the developer must package their code and dependencies into a zip file and upload it to AWS Lambda.

In summary, Lambda@Edge is a powerful tool that allows developers to customize and enhance the performance and security of their CloudFront distributions by running AWS Lambda functions at CloudFront edge locations.