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Question 1

FusionInsightHDin, aboutHivepartition (partition) function, which is wrong as described below?

Options :

A : Partition fields are defined when the table is created

B : There can only be one partition field, and multi-level partitions cannot be created

C : Using partitions can reduce the data scan range of some queries, thereby improving query efficiency

D : Partition fields can be used aswherecondition of the sentence

Answer: B

Question 2

when aMapRcdueWhen the application is executed, which of the following actions ismapoccurs before the stage of?

Options :

A : split

B : combine

C : partition

D : sort

Answer: A

Question 3

existFusionInsight HDmiddle,FlumeIn a configuration file, if there are multiplesource,butsourceThe name cannot be repeated.

Options :

A : True

B : False

Answer: A

Question 4

existFlumemiddle,sourceWhat is the main function of the function module?

Options :

A : Get data and convert raw data into data objects that you process yourself

B : Cache data and save data in memory or files according to different reliability policies

C : Output data to the destination, support multiple output protocols

D : Split the data and send the data to different destinations according to the characteristics of the data

Answer: A

Question 5

existSpark, which of the following is trueDataFrameThe operator that takes the intersection?

Options :

A : filter (condifionExpr: String): DataFrame

B : join (right: DataFrame, join Exprs: Column): DataFrame

C : intersect (other: Data Frame): Data Frame

D : dropDuplicates (): DataFrame

Answer: C