120. How can my AWS Lambda function personalize their behavior based on the identity of the end user of an application?
When your app uses the Amazon Cognito identity, end users can authenticate themselves using a variety of public login providers such as Amazon, Facebook, Google, and other OpenID Connect-compatible services. User identity is then automatically and secured presented to your Lambda function in the form of an Amazon Cognito id, allowing it to access user data from Amazon Cognito, or as a key to store and retrieve data in Amazon DynamoDB or other web services.
121. How do I create an Alexa skill using AWS Lambda?
AWS Lambda is integrated with the Alexa Skills Kit, a collection of self-service APIs, tools, documentation and code samples that make it easy for you to create voice-driven capabilities for Alexa. You simply upload the Lambda function code for the new Alexa skill you are creating, and AWS Lambda does the rest, executing the code in response to Alexa voice interactions and automatically managing the compute resources on your behalf.
122. What happens if my function fails while processing an event?
For Amazon S3 bucket notifications and custom events, AWS Lambda will attempt execution of your function three times in the event of an error condition in your code or if you exceed a service or resource limit.
123. How do I use an AWS Lambda function to respond to notifications sent by Amazon Simple Notification Service (SNS)?
From the AWS Lambda console, you can select a Lambda function and associate it with an Amazon SNS topic.
124. How do I use an AWS Lambda function to respond to emails sent by Amazon Simple Email Service (SES)?
From the Amazon SES Console, you can set up your receipt rule to have Amazon SES deliver your messages to an AWS Lambda function.
125. What is the latency of invoking an AWS Lambda function in response to an event?
AWS Lambda is designed to process events within milliseconds. Latency will be higher immediately after a Lambda function is created, updated, or if it has not been used recently.
126. Does AWS Lambda support environment variables?
Yes. You can easily create and modify environment variables from the AWS Lambda Console, CLI or SDKs.
