Which of the following are not part of the core elements of KrbServer?

• A.Kerberos KDC Server
• B.Kerberos Client
• C.Kerberos KDC Client
• D.KDC(Key Distribution Center)

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Which of the following options are suitable for MapReduce scenarios?

• A.Streaming computing
• B.Real-time interactive computing
• C.Offline calculation
• D.Iterative calculation

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The checkpoint mechanism in Flink continuously draws snapshots of streaming applications, and the state snapshots of streaming applications can only be saved in the HDFS file system.

• A.False
• B.True

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Which way is correct to load data into Hive table? (Multiple choice)

• A.Load the file in the local path directly into the Hive table.
• B.Insert the result set of other tables into the Hive table.
• C.Hive supports the method of insert into a single record, so you can insert a single record directly on the command line
• D.Load the files on HDFS into the Hive table.

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In the Spark SQL table, there are often many small files (the size is much smaller than the HDFS block size). In this case, Spark will start more tasks to process these small files. When there is a Shuffle operation in the SQL logic, it will greatly increase the number of hash buckets, which seriously affects performance.

• A.True
• B.False

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