existFusionInsight HDofHBase, which of the following scenarios will not triggerFlushoperate?

• A.RegionServerTotal memory exceeds threshold
• B.RegionofMemStoreset over threshold
• C.Initiate by client-specified methodFlushdo
• D.When the client initiates a scan request, it willscan cachingset too large

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HDFSIn application development of , which of the following fields areHDFSInterfaces supported by the service? (multiple choice)

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

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Below aboutZooKeeperThe description of the feature is wrong ()?

• A.Message updates can only succeed or fail, with no intermediate states.
• B.ZooKeeperThe number of nodes must be an odd number.
• C.Updates sent by the client are applied in the order in which they were sent.
• D.A message to be read by more than halfserverreceive, it will be able to successfully write to disk.

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pass throughHBasefofcreateTableThe method creates a table, what parameters must be passed in?

• A.can be empty
• B.Table Name
• C.table names and columns
• D.Table names and column families(family)

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existSpark, assuminglinesIs anDStreamobject, which of the following statements can periodically count this number of words on a stream?

• A.lines.flatMap(_.split(" ")).map(word =>(word,1)).reduceByKey(_+_).print ( )
• B.lines.flatMap(_.split(" ")).map(word =>(word,1)).reduce(_+_).print( )
• C.lines.flatMap(_.split(" ")).map(word =>(word,word.length())).reduceByKey (_+_).print( )
• D.lines.flatMap(_.split(" ")).flatmap(word =>(word,1)).groupByKey(_+_).print ( )

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