Which of the following is the correct syntax to apply a map operation on a Kafka stream named stream to convert messages to uppercase?

easy📝 Syntax Q12 of Q15

Kafka - Streams

Which of the following is the correct syntax to apply a map operation on a Kafka stream named stream to convert messages to uppercase?

Astream.map(value.toUpperCase)

Bstream.filter(value -> value.toUpperCase())

Cstream.map(value => value.toUpperCase())

Dstream.map(value -> value.toUpperCase())

Step-by-Step Solution

Solution:

Step 1: Identify correct lambda syntax in Kafka Streams
Kafka Streams in Java uses map(value -> ...) syntax for mapping values.
Step 2: Check method call correctness
value.toUpperCase() correctly converts string to uppercase.
Final Answer:
stream.map(value -> value.toUpperCase()) -> Option D
Quick Check:
Correct lambda and method call = stream.map(value -> value.toUpperCase()) [OK]

Quick Trick: Use arrow -> for lambda in Kafka Streams Java [OK]

Common Mistakes:

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