Which of the following steps are involved in preparing for Fusioninsight HD installation? (Multiple choice)

What can the unified certification management system of mainstream manufacturers consist of? (Multiple choice)

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.

TaskSlot in Flink is mainly used for resource isolation, including memory resources and CPU resources.

The description of the role of the standby NameNode in the HDFS system, which is correct? (Multiple choice)