Kafka - Streams
Given this Kafka Streams code snippet, what is the output if the input stream has values [1, 2, 3]?
stream.map(value -> value * 2)
Given this Kafka Streams code snippet, what is the output if the input stream has values [1, 2, 3]?
medium📝 Predict Output Q4 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand the map transformation
The map function multiplies each input value by 2.Step 2: Apply the transformation to each input value
1*2=2, 2*2=4, 3*2=6, so output is [2, 4, 6].Final Answer:
[2, 4, 6] -> Option BQuick Check:
map(value * 2) output = [2,4,6] [OK]
Quick Trick: map() applies function to each value, changing output accordingly [OK]
Common Mistakes:
MISTAKES- Assuming map() does not change values
- Confusing map() with filter()
- Calculating squares instead of doubling
Master "Streams" in Kafka
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