A consumer sends a request to commit offset 2000. There is a temporary communication problem, so the broker never gets the request and therefore never responds. Meanwhile, the consumer processed another batch and successfully committed offset 3000. What should you do?

• A.Add a new consumer to the group
• B.Use the kafka-consumer-group command to manually commit the offsets 2000 for the consumer group
• C.Restart the consumer
• D.Nothing

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while (true) {
ConsumerRecords<String, String> records = consumer.poll(100);
try {
consumer.commitSync();
} catch (CommitFailedException e) {
log.error("commit failed", e)
}
for (ConsumerRecord<String, String> record records)
{
System.out.printf("topic = %s, partition = %s, offset =
%d, customer = %s, country = %s
",
record.topic(), record.partition(),
record.offset(), record.key(), record.value());
}
}
What kind of delivery guarantee this consumer offers?

• A.Exactly-once
• B.At-least-once
• C.At-most-once

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I am producing Avro data on my Kafka cluster that is integrated with the Confluent Schema Registry. After a schema change that is incompatible, I know my data will be rejected. Which component will reject the data?

• A.The Confluent Schema Registry
• B.The Kafka Broker
• C.The Kafka Producer itself
• D.Zookeeper

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A producer just sent a message to the leader broker for a topic partition. The producer used acks=1 and therefore the data has not yet been replicated to followers. Under which conditions will the consumer see the message?

• A.Right away
• B.When the message has been fully replicated to all replicas
• C.Never, the produce request will fail
• D.When the high watermark has advanced

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What is returned by a producer.send() call in the Java API?

• A.Future<ProducerRecord> object
• B.A Boolean indicating if the call succeeded
• C.Future<RecordMetadata> object
• D.Unit

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