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FusionInsigt HD which of the following components can be used for data collection? (multiple choice)

A.

Flume

B.

Loader

C.

HBase

D.

MapReduce

Oozieofworkflow.xmlfile is the workflow configuration file

A.

True

B.

False

FlinkusecheckpointThe mechanism guarantees fault tolerance in the operation of the application.

A.

True

B.

False

existMapReduceDuring application development,setMapOutputCompressorClassWhat is the role of classes?

A.

AssumeSmapinput compression method

B.

set upmapHow the output is delivered

C.

set upmapoutput compression method

D.

set upreduceoutput compression method

Which of the following causesHDFSofNameNodeEntersafemode(safe read-only mode)?

(multiple choice)

A.

Active and standbyNameNodeof metadata is running out of disk space.

B.

The number of missing blocks exceeds the threshold.

C.

Lost replicas exceed the threshold.

D.

The corrupted copy exceeds the threshold.

SparkWhat kind of parameter setting methods does the application have?

(multiple choice)

A.

In the application configuration filespark-defaults.confconfigure in

B.

When submitting your application, pass--confmake settings

C.

In the application code, passSparkContextofsetPropertymethod to set

D.

In the application code, passSparkConfobject to set

existMapReduceIn the development framework,InputFormatWhat is the function of the class?

A.

mergemapThe result of the stage has the samekeyvalue key-value pair

B.

put allmapThe results of the stages are merged to get the final result

C.

rightmapThe results of the stages are sorted and merged

D.

Divide the input data into one by one. and split this further into pairs, then asmapfunction input of

which come downRedisIs the command an atomic operation?

A.

INCR(increment the stored digital value by one)

B.

HINCRBY(for the hash tablekeydomain infieldvalue plus incrementincrement

C.

LPUSH(for linked listspushoperate)

D.

All of the above

HDFSofClientWhen writing to a file, the first copy of the data is written to the location specified byNameNodeSure,

The other replicas are written to byDataNodeSure.

A.

True

B.

False

aboutRedisFeatures, the following description is correct? (multiple choice)

A.

low latency

B.

Rich data structures

C.

Support data persistence

D.

supportSQLquery interface

Sparkis a memory-based computing engine, allSparkData during program operation can only be stored in

in memory.

A.

True

B.

False

existMapReduceDuring application development,setMapOutputCompressorClassWhat is the role of classes?

A.

set upmapinput compression method

B.

set upmapHow the output is delivered

C.

set upmapoutput compression method

D.

set upreduceoutput compression method

existHadoopAmong the open source big data platforms, which are distributed storage components? (multiple choice)

A.

MapReduce

B.

SparkF

C.

HDFS

D.

HBase

FusionInsight HDin, aboutHive UDFsSecondary development, is the following description correct?

(multiple choice)

A.

user definedUDFBefore being used, it needs to beHivecreate this in the systemUDF.

B.

user definedUDF, information such as summary and status is not allowed.

C.

user definedUDF, can be added according to the actual situationdeterministicandstatefuletc. Notes.

D.

Under the secure cluster, user-definedUDF, it is recommended to create it once before each use.

HDFSThe system time of the node where the client is located is the same as theFusionInsight HDThe system time of the cluster should be maintained

Consistent, if there is a time difference, then the time difference should be less than a few minutes?

A.

5

B.

10

C.

20

D.

30