When the cluster is normal, the Redis client initiates a get call, and there are () message interactions between the client and the server?

• A.3
• B.1
• C.2
• D.4

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In HDFS application development, which of the following are the interfaces supported by the HDFS service? (multiple choice)

• A.BufferedOutputStream.flush
• B.FileSystem.append
• C.BufferedOutputStream.write
• D.FileSystem.create

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In FusionInsight HD, about Hive and Sparksql, which of the following descriptions are correct? (multiple choice)

• A.Both can run on the MapReduce computing framework
• B.Both can provide SQL or SQL-like capabilities externally
• C.Both can run on the Spark computing framework
• D.Both can access data on HBase through the table field and HBase field mapping method

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Which role in Yarn manages the resources (CPU/Memory) of a single node?

• A.NameNode
• B.NodeManager
• C.Data Node
• D.ResourceManager

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Which of the following reasons will cause HDFS NameNode to enter safemode (safe read-only mode)? (multiple choice)

• A.The number of lost blocks exceeds the threshold.
• B.The missing copy exceeds the threshold.
• C.The damaged copy exceeds the threshold.
• D.The disk space where the metadata of the active and standby NameNodes reside is insufficient.

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