In Kafka Streams, what happens if you apply a filter operation followed by a map operation, and the filter removes all records?

hard🧠 Conceptual Q10 of Q15

Kafka - Streams

In Kafka Streams, what happens if you apply a filter operation followed by a map operation, and the filter removes all records?

AThe map operation throws a runtime exception

BThe map operation processes all original records anyway

CThe map operation receives no records and produces an empty stream

DThe filter operation is ignored and all records pass

Step-by-Step Solution

Solution:

Step 1: Understand filter's effect on stream
If filter removes all records, the downstream operations receive no data.
Step 2: Effect on map operation
Map processes only records passed from filter, so it receives none and outputs empty stream.
Final Answer:
The map operation receives no records and produces an empty stream -> Option C
Quick Check:
Filter empty = map empty output [OK]

Quick Trick: Filter empty means map gets no records [OK]

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