Which of the following Java code snippets correctly creates a Kafka ProducerRecord with both a key and a value?

easy📝 Syntax Q3 of 15

Kafka - Producers

Which of the following Java code snippets correctly creates a Kafka ProducerRecord with both a key and a value?

Anew ProducerRecord<>("key1", "value1");

Bnew ProducerRecord<>("topicName", "value1");

Cnew ProducerRecord<>("topicName", "key1", "value1");

Dnew ProducerRecord<>("topicName");

Step-by-Step Solution

Solution:

Step 1: Understand ProducerRecord constructor
The constructor ProducerRecord(String topic, K key, V value) requires topic, key, and value.
Step 2: Analyze options
new ProducerRecord<>("topicName", "key1", "value1"); correctly passes topic, key, and value. new ProducerRecord<>("topicName", "value1"); misses the key. new ProducerRecord<>("key1", "value1"); incorrectly uses key as topic. new ProducerRecord<>("topicName"); only passes topic.
Final Answer:
new ProducerRecord<>("topicName", "key1", "value1"); -> Option C
Quick Check:
Constructor signature matches new ProducerRecord<>("topicName", "key1", "value1"); [OK]

Quick Trick: ProducerRecord needs topic, key, and value in order [OK]

Common Mistakes:

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