Streaming Fundamentals — ScreeningA phone-screen-style round on stream processing. Answer from first principles about time, state and delivery.

What is the difference between event time and processing time?

A watermark of 10:05 asserts that…

When is it safe to emit the result of a tumbling window ending at 10:00?

Which window type can overlap so one event lands in several windows?

What is 'state' in a streaming job?

A checkpoint is…

At-least-once delivery means…

Late data is…

Keyed state is partitioned by…

Backpressure means…