[Solved] Which of the following is the correct way to specify a key when producing a Kafka message in Java? — Ans: producer.send(new ProducerRecord(topic, key, value)); | Kafka

Kafka - Topics and Partitions

Which of the following is the correct way to specify a key when producing a Kafka message in Java?

Aproducer.send(new ProducerRecord<>(topic, key, value));

Bproducer.send(new ProducerRecord<>(topic, value));

Cproducer.send(new ProducerRecord<>(key, topic, value));

Dproducer.send(new ProducerRecord<>(value, key));

Step-by-Step Solution

Solution:

Step 1: Recall ProducerRecord constructor
The correct constructor is ProducerRecord(topic, key, value).
Step 2: Match options to constructor
producer.send(new ProducerRecord<>(topic, key, value)); matches the correct order: topic, key, value.
Final Answer:
producer.send(new ProducerRecord<>(topic, key, value)); -> Option A
Quick Check:
Correct ProducerRecord syntax = C [OK]

Quick Trick: Topic first, then key, then value in ProducerRecord [OK]

Common Mistakes:

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Which of the following is the correct way to specify a key when producing a Kafka message in Java?