Your topic is log compacted and you are sending a message with the key K and value null. What will happen?

• A.The broker will delete all messages with the key K upon cleanup
• B.The producer will throw a Runtime exception
• C.The broker will delete the message with the key K and null value only upon cleanup
• D.The message will get ignored by the Kafka broker

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Which of the following is true regarding thread safety in the Java Kafka Clients?

• A.One Producer can be safely used in multiple threads
• B.One Consumer can be safely used in multiple threads
• C.One Consumer needs to run in one thread
• D.One Producer needs to be run in one thread

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How much should be the heap size of a broker in a production setup on a machine with 256 GB of RAM, in PLAINTEXT mode?

• A.4 GB
• B.128 GB
• C.16 GB
• D.512 MB

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Suppose you have 6 brokers and you decide to create a topic with 10 partitions and a replication factor of 3. The brokers 0 and 1 are on rack A, the brokers 2 and 3 are on rack B, and the brokers 4 and 5 are on rack C.
If the leader for partition 0 is on broker 4, and the first replica is on broker 2, which broker can host the last replica? (select two)

• A.6
• B.1
• C.2
• D.5
• E.0
• F.3

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Select all the way for one consumer to subscribe simultaneously to the following topics - topic.history, topic.sports, topic.politics? (select two)

• A.consumer.subscribe(Pattern.compile("topic\..*"));
• B.consumer.subscribe("topic.history"); consumer.subscribe("topic.sports"); consumer.subscribe("topic.politics");
• C.consumer.subscribePrefix("topic.");
• D.consumer.subscribe(Arrays.asList("topic.history", "topic.sports", "topic.politics"));

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