Redis uses the exist command to determine whether a key exists.

• A.False
• B.True

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Which of the description of HIVE is wrong?

• A.Hive is built on Hadoop based on static batch processing. Hadoop usually has high latency and requires a lot of overhead for submission and scheduling.
• B.The best use scenario for Hive is batch processing of large data sets
• C.Hive can realize low-latency and fast query on large-scale data sets
• D.The Hive query operation process strictly follows the Hadoop MapReduce execution model. Hive converts the user's HiveQL statements into the MapReduce Hadoop cluster through the interpreter.

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Which two roles are responsible for HDFS's NameNode node active and standby state management and metadata file merging respectively?

• A.Main NameNode and JournalNode
• B.Primary NameNode and standby NameNode
• C.ZKFC and the main NameNode
• D.ZKFC and standby NameNode

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User authority management role-based access control (RBAC), providing visual multi-group unified cluster user authority management.

• A.False
• B.True

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When the Fusionlnsight HD product deploys Kerberos and LDAP services, which of the following descriptions is correct? (Multiple choice)

• A.LDAP service can be shared by multiple clusters
• B.Kerberos service and LDAP service are deployed on the same node to facilitate data access and improve performance
• C.Before deploying Kerberos service, LDAP service must be deployed
• D.LDAP service and Kerberos service must be deployed on the same node

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