Which is an optional field in an Avro record?
Answer(s): A
doc represents optional description of message
A consumer application is using KafkaAvroDeserializer to deserialize Avro messages. What happens if message schema is not present in AvroDeserializer local cache?
Answer(s): D
First local cache is checked for the message schema. In case of cache miss, schema is pulled from the schema registry. An exception will be thrown in the Schema Registry does not have the schema (Which should never happen if you set it up properly)
Which of the following event processing application is stateless? (Select two)
Answer(s): A,C
Stateless means processing of each message depends only on the message, so converting from JSON to Avro or filtering a stream are both stateless operations
A consumer starts and has auto.offset.reset=latest, and the topic partition currently has data for offsets going from 45 to 2311. The consumer group has committed the offset 643 for the topic before. Where will the consumer read from?
Answer(s): C
The offsets are already committed for this consumer group and topic partition, so the property auto.offset.reset is ignored
A Zookeeper ensemble contains 3 servers. Over which ports the members of the ensemble should be able to communicate in default configuration? (Select three)
Answer(s): A,B,D
2181 - client port, 2888 - peer port, 3888 - leader port
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