HDFSRuntime,NameNodewill load the entire metadata of the file system from disk into memory, so the file system The total number of files that can be stored is limited byNameNodememory capacity.

• A.True
• B.False

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FusionInsight HDmiddle,LoaderThe sequence of transformation steps for a job is input, transformation, and output.

• A.False
• B.True

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existBaseIn application development, when a table'sRowkeyRange and distribution are known, pre-score is recommendedregion, Please call the following code (fragment) to pre-sort a tableregionAfter this table will create severalregion?
splits0=Bytes.toBytes("A");splits1=Bytes.toBytes("H");splits2
=Bytes.toBytes("O");splits3=Bytes.toBytes("U");admin.createTable(htd,splits);

• A.4
• B.6
• C.3
• D.5

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existSparkIn application development, which of the following codes can correctly count words?

• A.val counts=textFile.map(line=>line.split(" ')).map(-rd=>(word,1)).reduceByKey(_+_)
• B.val counts=textFile.map(line=>line.split(" ")).map(word=>(word,1)).groupByKey()
• C.val counts=textFile.flatmap(line=>line.split(" ")).map(-rd=>(word,1)).reduceByKey()
• D.val counts=textFile.flatMap(line=>line.split(" ")).map(word=>(word,1)).reduceByKey(_+_)

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FusionInsight HDmiddle,HiveWhich of the following parameters of the client is used to controlreduceConcurrency? (multiple choice)

• A.hive.exec.max.dynamic.partitions.pernode
• B.hive.exec-ducers.max
• C.hive.exec.max.dynamic.partitions
• D.hive.exec.reducers.bytes.per.reducer

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