Where are the dynamic configurations for a topic stored?

1. A. In Zookeeper
2. B. In an internal Kafka topic topic_configuratins
3. C. In server.properties
4. D. On the Kafka broker file system

Correct Answer: A
Dynamic topic configurations are maintained in Zookeeper.

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

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

Correct Answer: AC
KafkaConsumer is not thread-safe, KafkaProducer is thread safe.

is KSQL ANSI SQL compliant?

1. A. Yes
2. B. No

Correct Answer: B
KSQL is not ANSI SQL compliant, for now there are no defined standards on streaming SQL languages

What is the risk of increasing max.in.flight.requests.per.connection while also enabling retries in a producer?

1. A. At least once delivery is not guaranteed
2. B. Message order not preserved
3. C. Reduce throughput
4. D. Less resilient

Correct Answer: B
Some messages may require multiple retries. If there are more than 1 requests in flight, it may result in messages received out of order. Note an exception to this rule is if you enable the producer settingenable.idempotence=true which takes care of the out of ordering case on its own. Seehttps://issues.apache.org/jira/browse/KAFKA-5494

To read data from a topic, the following configuration is needed for the consumers

1. A. all brokers of the cluster, and the topic name
2. B. any broker to connect to, and the topic name
3. C. the list of brokers that have the data, the topic name and the partitions list
4. D. any broker, and the list of topic partitions

Correct Answer: B
All brokers can respond to Metadata request, so a client can connect to any broker in the cluster.