With the continuous increase in the volume of big data, the requirements for the physical security of data storage are getting higher and higher, and higher requirements are put forward for multiple copies of data and disaster tolerance mechanisms.

In Huawei Fusioninsight HD, which of the following components are Flink strongly dependent on? (Multiple choice)

Kafka is a distributed message publishing and subscribing system. It only forwards messages and does not save messages.

Which of the following statements about worker, Executor and task are correct? (Multiple choice)

Which operations in Hive can be merged? (Multiple choice)