As a new team member, you are working on implementing Dead Letter Queues (DLQ) for AWS Lambda functions to handle failures gracefully. Dead Letter Queues are essential for ensuring that messages or tasks that could not be processed successfully by the Lambda function are not lost. Instead, they are added to a specified queue, such as an Amazon SQS queue, for further analysis or reprocessing.

As an AWS Certified Developer Associate, can you assist him in identifying the scenarios in which AWS Lambda will send a message to a DLQ after attempting to process it? (Select two)