Which of the following are enterprise-level big data application scenarios? (Multiple choice)

Which of the following statements about atomicity in the key features of ZooKeeper is correct?

The secondary index provides HBase with the ability to index according to the values of certain columns. The secondary index first checks the index table, and then locates the position in the data table, without a full table scan.

Which of the following is not included in the scheme authentication method of Zookeeper?

The emergence of HFS solves the need to store a large number of small files (below 10MB) in HDFS. At the same time, some mixed scenes of large files (above 10MB) should be stored