When is the onCompletion() method called?
private class ProducerCallback implements Callback {
@Override
public void onCompletion(RecordMetadata recordMetadata, Exception e) {
if (e != null) {
e.printStackTrace();
}
}
}
ProducerRecord<String, String> record =
new ProducerRecord<>("topic1", "key1", "value1");
producer.send(record, new ProducerCallback());

• A.When the message is partitioned and batched successfully
• B.When message is serialized successfully
• C.When the broker response is received
• D.When send() method is called

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Producing with a key allows to...

• A.Ensure per-record level security
• B.Influence partitioning of the producer messages
• C.Add more information to my message
• D.Allow a Kafka Consumer to subscribe to a (topic,key) pair and only receive that data

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Which is an optional field in an Avro record?

• A.doc
• B.name
• C.namespace
• D.fields

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What client protocol is supported for the schema registry? (select two)

• A.HTTP
• B.HTTPS
• C.JDBC
• D.Websocket
• E.SASL

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A Zookeeper ensemble contains 5 servers. What is the maximum number of servers that can go missing and the ensemble still run?

• A.3
• B.4
• C.2
• D.1

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