Integration / Apache Pulsar Interview questions
What are Pulsar Functions?
Pulsar Functions are a lightweight, serverless-style compute framework built into Pulsar that let you run simple processing logic - a Java, Python, or Go function - directly against messages on a topic without standing up a separate stream-processing cluster.
A function reads from one or more input topics, applies user code to each message, and optionally writes results to an output topic, with Pulsar handling deployment, scaling, and fault tolerance for you.
They suit lightweight transformations, filtering, or enrichment; for complex stateful stream processing at scale, teams typically still reach for a dedicated engine like Flink, but Functions cover a large share of everyday use cases with far less operational overhead.
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