[Solved] What will be the output of the following Kafka producer c... What will be the output of the following Kafka producer code snippet?ProducerRecord record = new ProducerRecord("topic1", null, "value1"); | Kafka

Kafka - Producers

What will be the output of the following Kafka producer code snippet?

ProducerRecord record = new ProducerRecord<>("topic1", null, "value1");
System.out.println(record.key());
System.out.println(record.value());

Anull\nvalue1

Bvalue1\nnull

Cnull\nnull

DCompilation error

Step-by-Step Solution

Solution:

Step 1: Analyze record creation with null key
The key is explicitly set to null, value is "value1".
Step 2: Print key and value
Printing key outputs null, printing value outputs "value1".
Final Answer:
null\nvalue1 -> Option A
Quick Check:
Null key prints null, value prints actual string [OK]

Quick Trick: Null key prints as null, value prints normally [OK]

Common Mistakes:

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