Question 1

Hadoopenabled in the platformYARNWhich parameter needs to be configured for the log aggregation function of the component?

Options :

A : yarn.nodemanager.local-dirs

B : yarn.nodemanager.log-dirs

C : yarn.acl.enable

D : yarn.log-aggregation-enable

Answer: D

Question 2

Which of the following causesHDFSofNameNodeEntersafemode(install'aroot form)? (multiple choice)

Options :

A : Active and standbyNameNodeThe disk space where the metadata is located is insufficient.

B : The number of missing blocks exceeds the read value.

C : Lost copies exceed read value.

D : The corrupted copy exceeds the threshold.

Answer: A,C,D

Question 3

when aMapReduceWhen the application is executed, which of the following actions ismapoccurred before the stage?

Options :

A : split

B : combine

C : partition

D : sort

Answer: A

Question 4

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

Question 5

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

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