A.Hive metadata storage is independent of data storage, and metadata and data are decoupled, with high flexibility, while traditional data warehouse has single data application and low flexibility.
B. Because Hive is based on big data platform, the query efficiency is faster than that of traditional data warehouse. (correct answer)
C because Hive data is stored in HDFS, it can ensure high fault tolerance and reliability of data.
D.Hive is based on HDFS storage. Theoretically, the storage capacity can be infinitely expanded, while the storage capacity of traditional data warehouses will have an upper limit.