[Solved] What will the deserializer return for input null in this code?public String deserialize(String topic, byte[] data) { if (data == null) return null; return new String(data, StandardCharsets.UTF_8); } | Kafka

Kafka - Advanced Stream Processing

What will the deserializer return for input null in this code?

public String deserialize(String topic, byte[] data) {
    if (data == null) return null;
    return new String(data, StandardCharsets.UTF_8);
}

AString "null"

BEmpty string ""

Cnull

DThrows NullPointerException

Step-by-Step Solution

Solution:

Step 1: Check null input handling
If data is null, method returns null immediately.
Step 2: Confirm no exception thrown
Code explicitly returns null, so no exception or string conversion occurs.
Final Answer:
null -> Option C
Quick Check:
Deserialize null input returns null [OK]

Quick Trick: Deserializer returns null if input byte array is null [OK]

Common Mistakes:

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