Which of the following descriptions about bucketing is correct in Hive? (Multiple choice)

HDFS supports large file storage, and supports multiple users to write to the same file, as well as modify any location of the file.

Fusioninsight HD cluster contains a variety of services, and each service is composed of several roles. Which of the following are service roles? (Multiple choice)

The smallest processing unit of HBase is Region. Where is the routing information between User Region and Region Server stored in?

Fusionlnsight HD uses HBase client to write 10 pieces of data in batches.
A Regionserver node contains 2 Regions of the table, A and B respectively.
Two of the 10 pieces of data belong to A and 4 belong to B.
How many RPC requests need to be sent to the Regionserver to write these 10 pieces of data?