[Solved] What is the issue with this Kafka deserializer implementation?public class StringDeserializer implements Deserializer { public String deserialize(String topic, byte[] data) { return new String(data);... | Kafka

Kafka - Advanced Stream Processing

What is the issue with this Kafka deserializer implementation?

public class StringDeserializer implements Deserializer {
    public String deserialize(String topic, byte[] data) {
        return new String(data);
    }
}

AIt incorrectly converts bytes to uppercase strings.

BIt does not handle null byte arrays, which can cause NullPointerException.

CIt uses an unsupported character encoding.

DIt returns a byte array instead of a String.

Step-by-Step Solution

Solution:

Step 1: Review deserialize method
Method calls new String(data) without checking if data is null.
Step 2: Identify potential error
If data is null, new String(data) throws NullPointerException.
Step 3: Correct approach
Should check if data is null and return null or handle accordingly.
Final Answer:
It does not handle null byte arrays, which can cause NullPointerException. -> Option B
Quick Check:
Always check for null before converting bytes [OK]

Quick Trick: Null byte arrays cause exceptions if unchecked [OK]

Common Mistakes:

MISTAKES

Ignoring null checks on input byte arrays
Assuming default charset without specifying

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What is the issue with this Kafka deserializer implementation?

Step 1: Review deserialize method

Step 2: Identify potential error

Step 3: Correct approach

Final Answer:

Quick Check:

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