A.In a secure cluster, user-defined UDFs are recommended to be created before each use.

B.User-defined UDF is not allowed to add information such as summary and status.

C.User-defined UDF can add deterministic and statefull annotations according to the actual situation.

D.Before the user-defined UDF is used, it needs to be created in the Hive system.

A.lob

B.FileSystem

C.Context

D.Configuration

A.Kafka is suitable for offline and online message consumption scenarios

B.Kafka can ensure that the messages in each Partition are in order

C.Kafka is a high-throughput, distributed, publish-and-subscribe messaging system

D.Kafka can achieve message persistence

A.High fault tolerance

B.High performance

C.Scalable

D.Stream processing

A.INCR (increase the stored digital value by one)

B.LPUSH (push operation on linked list)

C.HINCRBY (add incremental increment to the field value in the hash table key)

D.All of the above