AWS Certified Developer Associate Practice Test 3

Correct answers - "The invocation was asynchronous & The invocation failed" : Any Lambda function invoked asynchronously is retried twice before the event is discarded. If the retries fail and you're unsure why, use Dead Letter Queues (DLQ) to direct unprocessed events to an Amazon SQS queue.

"The invocation was synchronous" - Any Lambda function invoked asynchronously is retried twice before the event is discarded

"The invocation succeeded" - The initial invocations have to fail that's what tells us there is something wrong

"The invocation failed only once but succeeded afterwards" - It would have to fail twice before using SQS DLQ

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