Answer: change data capture (CDC) feed, IoT devices

Stream processing pipelines consume data that is continuously generated. Typical sources include CDC feeds (which emit row-level changes from transaction systems), message brokers like Kafka, and real-time sensors/IoT devices. Delta Lake is primarily a storage layer for batch and incremental processing (it can be read in streaming via Delta streaming but it's not a primary source in the sense of event streams). However, this question asks to select two responses: the best two are CDC (A) and IoT devices (D). If Kafka was an option it would also be a valid source, but the question asked for two and the highlighted correct answers are A and D in the image.

Author: LeetQuiz .