Which of the following can trigger AWS Lambda functions?

The ability of AWS Lambda functions to be triggered by various events hinges on the integration capabilities offered by AWS services. The correct choice identifies three specific triggering mechanisms that are commonly used with AWS Lambda.

API Gateway serves as a bridge for connecting web applications to backend services. By configuring API Gateway to invoke a Lambda function in response to HTTP requests, developers can build serverless applications that scale automatically with incoming traffic.

Scheduled events, often configured using Amazon CloudWatch Events or EventBridge, allow users to set up cron-like schedules that trigger Lambda functions at regular intervals. This capability is invaluable for tasks such as periodic data processing or routine cleanup operations.

Insert records into DynamoDB is significant because AWS Lambda can automatically trigger a function whenever data is modified in a DynamoDB table. This is particularly useful for architectures that rely heavily on event-driven designs, where changes in data directly invoke processing functions.

In contrast, other options contain aspects that, while relevant to event triggers in some contexts, do not encompass the same level of direct integration with AWS Lambda or misrepresent the actual trigger capabilities. Understanding the fundamental event-driven architecture of AWS Lambda and its integration with other AWS services is key to leveraging its full potential effectively.