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HCIP-Big Data Developer V2.0 Question and Answers

HCIP-Big Data Developer V2.0

Last Update May 21, 2024
Total Questions : 526

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Questions 1

existHBaseIn table design, it is common to multiple businessesrowkey, what are the possible countermeasures for situations that lead to data access contradictions?

slightly? (multiple choice)

Options:

A.  

compromise method (rowkeyDesign takes into accountAandBbusiness needs)

B.  

Redundancy method (use space for time factory efficiency)

C.  

Create secondary index

D.  

pre-scoreregion

Discussion 0
Questions 2

FusionInsight ManagerRegarding the management operations of services, which of the following statements is wrong?

Options:

A.  

Can start, stop and restart the service

B.  

Services can be added and uninstalled.

C.  

Uncommon services can be set to hide or show

D.  

Can view the current status of the service

Discussion 0
Questions 3

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

(multiple choice)

Options:

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.

Discussion 0
Questions 4

FusionInsight HDin, aboutOozieWhich of the following descriptions is correct?

(multiple choice)

Options:

A.  

submitcommand to change the status of the job toPREP

B.  

statcommand allowsPREPThe status of the job changes toRUNNINGrun

C.  

Runcommand to change the job status toRUNNINGl

D.  

KillCommands can act onPREP/SUSPEND/RUNNINGstatus job

Discussion 0
Questions 5

In ThereNnodesFusionInsightHDDeploy in a clusterHBase, it is recommended to deploy()HMaster process, ( )RegionServerprocess?

Options:

A.  

2， 2

B.  

3， N

C.  

2， N

D.  

N, N

Discussion 0
Questions 6

FusionInsight HD HBasein the cluster,Table1belongNamespace1,Table2belong

Namespace2,Table1There are two column families, namelycf11,c12,Table2There is a column family namedcf21,

Which of the following options will allow the user accountAalso havecf11andcf21read and write permissions. (multiple choice)

Options:

A.  

Assign this user accountglobalread permission

B.  

Give this user accountNamespace1read and write permissions

C.  

Assign this user accountTable1andTable2read and write permissions

D.  

Assign this user accountNamespace1andNamespace2read and write permissions

Discussion 0
Questions 7

FusionInsight HDmiddle,StreamingPackaging tools are used to package business codejarpackages and other dependenciesjarpackage, etc. a completeStreamingAppliedjarBag

Options:

A.  

True

B.  

False

Discussion 0
Questions 8

Solris a high-performance, basedLucenefull-text search service.SolrrightLuceneexpanded,

provides a ratioLuceneA richer query language and a powerful full-text search function are implemented, with a high degree of reliability.

Extensibility. At the same time fromSolr 4.0Version starts, supportsSolrCloudmodel.

Options:

A.  

True

B.  

False

Discussion 0
Questions 9

RDDasSparkmost__________The core object has which of the following characteristics? (multiple choice)

Options:

A.  

read only

B.  

partition

C.  

fault tolerance

D.  

efficient

Discussion 0
Questions 10

A large-scale production enterprise plans to transform its internal logistics data and sales data into big data. The design department gives

Based on the analysis of the data storage scheme, which of the following statements are correct?

(multiple choice)

Options:

A.  

HBaseIt can store massive data and support dynamic expansion, which can fulfill the storage requirements of logistics and sales data.

B.  

HbaseIt supports efficient random reading, and can complete real-time analysis and command of the logistics situation through reasonable design.

C.  

Logistics data is very sparse,HBaseCan handle sparse data efficiently.

D.  

HBaseIt can be built on ordinary commercial servers, and the construction cost is relatively low.

Discussion 0
Questions 11

aboutFusionInsight HDofSpark, which of the following programming languages can be used to developSparkapplication? (multiple choice)

Options:

A.  

C

B.  

Scala

C.  

Java

D.  

Python

Discussion 0
Questions 12

Spark on YARNin modedriverOnly works on the client side.

Options:

A.  

True

B.  

False

Discussion 0
Questions 13

HBaseFilters can set column names or column values as filter conditions, and support the use of multiple filters at the same time.

Options:

A.  

True

B.  

False

Discussion 0
Questions 14

FusionInsight HDin useStreamingofA, CKWhich of the following statements is true

of? (multiple choice)

Options:

A.  

After enabling Acker, Streaming will identify the failed Tuple and automatically resend it without human intervention pre.

B.  

Acker will identify the processing timeout or processing failed messages as fail.

C.  

Starting from the spout, failure of any link in the formed tuple tree will mark the entire tree as failure.

D.  

The application needs to implement the message resend logic in the fail) interface method of spout.

Discussion 0
Questions 15

Which of the following scenarios is notflinkWhat does the component excel at()?

(multiple choice)

Options:

A.  

Batch Iterative

B.  

Computing Stream

C.  

Processing

D.  

Data Storage

Discussion 0
Questions 16

TowardsHBaseincrease in the clusterRegionServerhost, the original cluster must be stopped first, becauseHBase

Dynamic expansion is not supported.

Options:

A.  

True

B.  

False

Discussion 0
Questions 17

existFusionInsight HDmiddle,SparkBy defaultYARNAs a cluster resource management system.

Options:

A.  

True

B.  

False

Discussion 0
Questions 18

existFusionInsight HDin, 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

Discussion 0
Questions 19

existKafkamiddle,ConsumerIt can support offline message and online message consumption at the same time, but consume data sequentially

of.

Options:

A.  

True

B.  

False

Discussion 0
Questions 20

existFusionInsight HDmiddle,FlumeWhich of the following are supportedsourceTypes of? (multiple choice)

Options:

A.  

Avro

B.  

HBase

C.  

Kafka

D.  

HTTP

Discussion 0
Questions 21

HDFSclient withNcopy toHDFSWhen writing a file, if one of the replicas fails to write, all replicas will return to writing.

Entry failed.

Options:

A.  

True

B.  

False

Discussion 0
Questions 22

about the followingHDFSWhat is the correct process for the client to read the file? (multiple choice)

Options:

A.  

priority from the nearestDataNodeDownload data.

B.  

file data fromDataNodeback toNameNode, then fromNameNodeDown to the client.

C.  

If the client and the connectedDataNodeIf there is a failure in reading, then the client will give up the applause node and connect the node where other replicas are located.

D.  

Supports multiple clients fromDataNoderead the same file data.

Discussion 0
Questions 23

aboutStreamingdisaster recovery capability, which of the following statements is correct? (multiple choice)

Options:

A.  

SupervisorAfter the process exits, it can beNimbusAutomatically identify and pull up without affecting running business.

B.  

WorkerCan be used after abnormal exitSupervisorPulls up automatically without manual intervention.

C.  

When a node fails, the tasks on the node will be reassigned to other normal nodes without manual intervention.

D.  

NimbusAfter the failure, the backupNimbusIt will take over automatically without affecting the running business.

Discussion 0
Questions 24

HDFSThere is a file in the cluster and directorytext.txt, which of the following commands can find theDatNodenode

information?

Options:

A.  

hdfs fsck /test.txt–files

B.  

hdfs fsck /text.txt–locations

C.  

hdfs fsck /test.txt–blocks

D.  

hdfs fsck /test.txt–list–corruptfileblocks

Discussion 0
Questions 25

A large-scale production enterprise plans to transform its internal logistics data and sales data into big data. The design department provides data storage

Analysis of the program, which of the following statements are correct?

Options:

A.  

HBaseIt can store massive data and support dynamic expansion, which can fulfill the storage requirements of logistics and sales data.

B.  

HbaseSupport colleges and universities to read immediately, and can complete real-time analysis and command of the logistics situation through reasonable design.

C.  

Logistics data is very sparse,HBaseCan handle sparse data efficiently.

D.  

HBaseIt can be built on ordinary commercial servers, and the construction cost is relatively low.

Discussion 0
Questions 26

YarnWhich role is to manage individual node resources (CPU/Memory)of?

Options:

A.  

NodeManager

B.  

Resource Manager

C.  

Data Node

D.  

NameNode

Discussion 0
Questions 27

FusionInsight HDin, belonging toStreamingWhat are the roles of the service? (multiple choice)

Options:

A.  

Nimbus

B.  

Supervisor

C.  

Broker

D.  

quorumpeer

Discussion 0
Questions 28

existFusionInsight HD where can I viewMapReduceThe result of running the application?

Options:

A.  

FusionInsight Managerofwebinterface

B.  

Loader Webinterface

C.  

Solr webinterface

D.  

Yarn Webinterface

Discussion 0
Questions 29

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

Options:

A.  

hive.exec.reducers.bytes.per.reducer

B.  

hive.exec-ducers.max

C.  

hive.exec.max.dynamic.partitions

D.  

hive.exec.max.dynamic.partitions.pernode

Discussion 0
Questions 30

FusionInsight HDin, aboutHive UFDSecondary development, is the following description correct? (multiple choice)

Options:

A.  

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

B.  

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

C.  

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

D.  

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

Discussion 0
Questions 31

An application requires simultaneous and twoFusionInsightsCluster interaction: both need to access the cluster1ofHBaseservice, need to visit

Ask the cluster2ofHiveServe;

So which of the following operations are required? (multiple choice)

Options:

A.  

in the cluster1Create the account required for this application on theHBaseServe

B.  

in the cluster2created onAThe account with the same name in the options, and set this account to be able to access the cluster'sHiveServe

C.  

Aoptions andBThe account created by the option must belong tosupergroupGroup

D.  

cluster1and cluster2Complete the mutual trust operation

Discussion 0
Questions 32

aboutRedisCluster topology information, is the following description correct?

Options:

A.  

The client caches the topology information of the cluster

B.  

The server caches the topology information of the cluster

C.  

both are

D.  

more than two

Discussion 0
Questions 33

aboutFlumeWhich of the following descriptions is correct?

Options:

A.  

(1) data fromsourcearrivechannel;(2)sinkfromchannelfetch data

B.  

(1) data fromchannelarrivesource;(2)sinkfromsourcefetch data

C.  

(1) data fromsinkarrivechannel;(2)sourcefromchannelfetch data

D.  

(1) data fromchannelarrivesource;(2)sinkfromsourcefetch data

Discussion 0
Questions 34

existKafkamiddle,ProducerThis can be done by configuring the synchronization parameters (producer.type) to ensure that data is sent in order.

Options:

A.  

True

B.  

False

Discussion 0
Questions 35

HDFSWhich of the following business scenarios is not applicable to?

Options:

A.  

Mass data storage

B.  

Lots of small file storage

C.  

large file storage

D.  

Streaming file storage

Discussion 0
Questions 36

which come downRedisIs the command an atomic operation?

Options:

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

Discussion 0
Questions 37

Suppose there is an application that needs to be accessed frequentlyOracleThe user table in the database, in order to improve performance, introduceRedisto cache users

information.

For this scene,RedisWhich of the following is the best data structure choice for ?

Options:

A.  

list

B.  

set

C.  

hash

D.  

sorted set

Discussion 0
Questions 38

Fusionlnsigt HD the user wants to passHBase shelloperation to query aHBaseThe contents of the table, this scenario is pushed down

It is recommended that the administrator assign a machine account to this user.

Options:

A.  

True

B.  

False

Discussion 0
Questions 39

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

Options:

A.  

low latency

B.  

Rich data structures

C.  

Support data persistence

D.  

supportSQLquery interface

Discussion 0
Questions 40

Fusionlnsigt HD the user wants to passHBase shelloperation to query aHBaseThe contents of the table, this scenario is pushed down

It is recommended that the administrator assign a machine account to this user.

Options:

A.  

True

B.  

False

Discussion 0
Questions 41

Which of the following methods can generateDStreamobject?

Options:

A.  

KafkaUtils.createStream(…)

B.  

KafkaUtils.createDirectStream(…)

C.  

StreamingContext.socketStream

D.  

StreamingContext.fileStream(…)

Discussion 0
Questions 42

existFusionInsight HDcluster, aboutkinitOperation command, which of the following statements is wrong? (multiple choice)

Options:

A.  

Only the HMI account can be used.

B.  

Only the machine account can be used.

C.  

A client does not support the simultaneous use of multiple accounts.

D.  

The ticket obtained by executing this command is intwenty fourIt will time out when it is small and needs to be executed againkinitcommand to log in again.

Discussion 0
Questions 43

Fusionlnsigt HDWhat distributed computing frameworks do big data platforms provide? (multiple choice)

Options:

A.  

HBase

B.  

Spark

C.  

MapReduce

D.  

Streaming

Discussion 0
Questions 44

existHBaseIn table design, it is common to multiple businessesrowkey, what are the possible countermeasures for situations that lead to data access contradictions?

slightly? (multiple choice)

Options:

A.  

compromise method (rowkeyDesign takes into accountAandBbusiness needs)

B.  

Redundancy method (use space for time factory efficiency)

C.  

Create secondary index

D.  

pre-scoreregion

Discussion 0
Questions 45

A project needs to save the Internet access data in a certain area, and search the full text of these Internet access records to see if there is any sensitive data.

Sensitive information is used to prevent crimes in this area. In this scenario, which of the following options is the best?

Options:

A.  

Create an index on solr, save the data, and return all the data during full-text search

B.  

Store data on HBase, and satisfy fuzzy matching queries through HBase's filtering feature

C.  

When storing data, build an index on solr, and store complete data in HBase: query full text through solr

D.  

Retrieve the key information of the record, and obtain the complete record on HBase through the key information

Discussion 0
Questions 46

useFusionInsight HDofHiveQuery data, when the amount of data in the intermediate results of the query is large, you can choose to compress the intermediate data

Structured data for better performance.

Which of the following areHiveRelevant parameters for intermediate result compression? (multiple choice)

Options:

A.  

hive.exec.compress.intermediate

B.  

hive.intermediate.compression.codec

C.  

hive.exec.compress.output

D.  

hive.intermediate.compression.type

Discussion 0
Questions 47

Set the block storage size to128M,HDFSWhen the client is writing a file, when writing a100Msize file, real

How much storage space does it take up?

Options:

A.  

128M

B.  

100M

C.  

64M

D.  

50M

Discussion 0
Questions 48

In the online log query scheme, adopted? processing to complete the calculation work. During the whole calculation process, the intermediate calculation results need to be

For temporary storage, which of the following components are suitable for storing intermediate calculation results? (multiple choice)

Options:

A.  

HDfS

B.  

HBase

C.  

Kafka

D.  

Redis

Discussion 0
Questions 49

existStreamingin application development,BoltUse which of the following interfaces to sendTuple?

Options:

A.  

to emit

B.  

execute

C.  

open

D.  

nextTuple

Discussion 0
Questions 50

An application requires simultaneous and twoFusionInsightsCluster interaction: both need to access the cluster1ofHBaseservice, need to visit

Ask the cluster2ofHiveServe;

So which of the following operations are required? (multiple choice)

Options:

A.  

in the cluster1Create the account required for this application on theHBaseServe

B.  

in the cluster2created onAThe account with the same name in the options, and set this account to be able to access the cluster'sHiveServe

C.  

Aoptions andBThe account created by the option must belong tosupergroupGroup

D.  

cluster1and cluster2Complete the mutual trust operation

Discussion 0
Questions 51

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

Options:

A.  

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

B.  

The number of missing blocks exceeds the threshold.

C.  

Lost replicas exceed the threshold.

D.  

The corrupted replica exceeds the threshold.

Discussion 0
Questions 52

existFusionInsight HD where can I viewMapReduceThe result of running the application?

Options:

A.  

FusionInsight Managerofwebinterface

B.  

Loader Webinterface

C.  

Solr webinterface

D.  

Yarn Webinterface

Discussion 0
Questions 53

Oozieofworkflow.xmlfile is the workflow configuration file

Options:

A.  

True

B.  

False

Discussion 0
Questions 54

HDFSclient withNWhen a copy writes a file, which of the following is true about the writing process? (multiple choice)

Options:

A.  

eachDataNodemaximum storage1copies.

B.  

Support multiple users to write to the same file at the same time.

C.  

The first copy of the data block is placed preferentially on the node where the client writing the data block is located.

D.  

Copied file blocks all exist on the same rack by default.

Discussion 0
Questions 55

solris a high-performance, basedLucenefull-text search service.SolrxrightLuceneto expand,

Loss of fruit supportSolrCloudmodel.

Options:

A.  

True

B.  

False

Discussion 0
Questions 56

HBasedata fileHFileone ofKeyValueWhat information does the format contain?

(multiple choice)

Options:

A.  

Key

B.  

Value

C.  

timeStamp

D.  

KeyType

Discussion 0
Questions 57

FusionInsight HDin the system,SolrExample projectsolr-examplelconfsolr-example.properties middleZK URLandZOOKEEPER DEFAULT SERVER PRINCIPALThe value of can be selected from which of the following options Obtain?

Options:

A.  

fromSolr Admin UIinterface acquisition

B.  

existsolr-examplelconf solr-example.properties, already with these two parameters by default

C.  

fromFusionInsight Manager SolrGet the service configuration interface

Discussion 0
Questions 58

MapReduceIn which of the following is the task ultimately performed?

Options:

A.  

NodeManager

B.  

container

C.  

ResourceManager

D.  

AppMaster

Discussion 0
Questions 59

Below aboutZKFCThe statement is wrong ().

Options:

A.  

zKFC(ZKFalovercontroler)as aZoKeeperCluster client for monitoringNameNode

status information.

B.  

zkFCprocess hopeNameNodenode andZoKeeperofLeaderdeployed in the node.

//(ZKFCProcess is only deployingNameNodeexists in the node)

standbyameodepassZokceperKnow moreAcibe Nameodestate, onceAeametoesmachine,Standby

C.  

NameNodeThe primary operation will be performed.

D.  

HdFSNameoofCConnected to2Ke4Pf, save the hostname and other information tozoKe-p%rmiddle

Discussion 0
Questions 60

FusionInsight HDin, aboutHivethe data load function (viaHiveofLOADcommand guide

input data), which of the following descriptions is wrong?

Options:

A.  

available fromHDFSdirectly into thehivesurface

B.  

available fromHiveServerThe local hard disk of the node is directly loaded into thehivesurface,

C.  

It can be directly loaded from the local hard disk of the node where the client is located.hivesurface

D.  

HiveThe data loading process does not parse the specific file content, mainly the process of file transfer

Discussion 0
Questions 61

scountryonnsgtHDWhen developing applications with a secure version, you can usekeytabfile forKerberosinstall

Fully certified.

Options:

A.  

True

B.  

False

Discussion 0
Questions 62

Below aboutZooKeeperThe statement is wrong ().

Options:

A.  

If ZooKeeperIf there is an interruption in the process of synchronizing the message, after the failure is recovered, the transmission status before the failure can be adjusted according to the the state continues to synchronize, that is, support for resuming transmission from a breakpoint.

B.  

ZooKeeperUse a custom atomic message protocol to ensure the consistency of node data in the entire system.

C.  

ZooKeeperThe cluster is elected at startupLeaderRole.

D.  

LeaderAfter a node receives a data change request, it first writes to disk and then writes to memory.

Discussion 0
Questions 63

FusionInsight HDWhich components in the platform support table and column encryption?

(multiple choice)

Options:

A.  

HDFS

B.  

HBase

C.  

Hive

D.  

Flink

Discussion 0
Questions 64

Which of the following is notMapReducespecialty?

Options:

A.  

Easy to program.

B.  

Good scalability

C.  

Calculate in real time

D.  

High fault tolerance

Discussion 0
Questions 65

existKafkain, aboutConsumerWhich statement is correct? (multiple choice)

Options:

A.  

mouthConsumerMainly for data consumption

B.  

mouthConsumerNeed to specify when consuming dataTopic

C.  

multiple mouthsConsumerconfigure the samegroup.idwhen theseConsumerConsumed data will not be duplicated

D.  

Kou XinConsumerAPIConsumption data does not need to be specifiedZooKeeperaddress

Discussion 0
Questions 66

forFusionInsight HDplatformHBasecomponent, adding a secondary index needs to define the secondary index Which properties? (multiple choice)

Options:

A.  

index name

B.  

index column

C.  

Index column type (and index column length)

D.  

the name of the column family to which the indexed column belongs,

Discussion 0
Questions 67

Which of the following is notHBaseThe roles or services involved in the read data process? (Writing isHMaster)

Options:

A.  

ZooKeeper

B.  

HDFS

C.  

HMaster

D.  

RegionServer

Discussion 0
Questions 68

forHBase rowkeyThe design principles described below are correct? (multiple choice)

Options:

A.  

Attribute values with high port access weights are placed inRowKeyFront

B.  

Attribute values with high port access weights are placed inRowkeysecond half

C.  

The attribute value with good dispersion is placed inRowkeyfirst half

D.  

The attribute value with good dispersion is placed inRowkeysecond half

Discussion 0
Questions 69

Flumesupport real-time data collectionsourceWhich is the type?

Options:

A.  

taildir

B.  

Log

C.  

JMS

D.  

Thrift

Discussion 0
Questions 70

Regarding the Hive service of the FusionInsight HD platform and its WebHCat development interface, the following description does not

the correct one is

Options:

A.  

Support for REST-based query requests

B.  

The returned data format of WebHCat is XML

C.  

WebHCat provides external services based on HTTP and HTTPS protocols

D.  

You can create tables, query and other operations through WebHCat

Discussion 0
Questions 71

existHBaseWhich of the following interfaces or classes does not need to be involved in the implementation of business logic for writing data?

Options:

A.  

Put

B.  

HTable

C.  

HBaseAdmin

D.  

Puttist

Discussion 0
Questions 72

which come downRedisIs the command an atomic operation?

Options:

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

Discussion 0
Questions 73

Rcboft0system, abouteWhich of the provided file formats is not in column format?

Options:

A.  

ORC(High-performance column store)

B.  

Parquetcolumn store

C.  

RCFileRow-column storage

D.  

TextFile

Discussion 0
Questions 74

aboutKafkaInsufficient disk capacity alarm, which of the following analysis is incorrect for the possible reasons?

Options:

A.  

The disk configuration (such as the number of disks, disk size, etc.) used to store Kafka data cannot meet the current industry requirements.

service data traffic, causing the disk usage to reach the upper limit

B.  

The data storage time is configured too long, and the accumulated data reaches the upper limit of the disk usage.

C.  

Unreasonable business planning results in uneven data distribution and some disks reach the upper limit of usage

D.  

Broker node failure caused

Discussion 0
Questions 75

Which of the following is notMapReducespecialty?

Options:

A.  

easy to program

B.  

good scalability

C.  

real-time computing

D.  

High fault tolerance

Discussion 0
Questions 76

HDFSIt adopts a "write once, read many" file access model. So it is recommended that a file be created, written and

After closing, do not modify it again.

Options:

A.  

True

B.  

False

Discussion 0
Questions 77

aboutFlumeWhich of the following descriptions is correct?

Options:

A.  

(1) data fromsourcearrivechannel;(2)sinkfromchannelfetch data

B.  

(1) data fromchannelarrivesource;(2)sinkfromsourcefetch data

C.  

(1) data fromsinkarrivechannel;(2)sourcefromchannelfetch data

D.  

(1) data fromchannelarrivesource;(2)sinkfromsourcefetch data

Discussion 0
Questions 78

existMapReduceDuring application development,setMapOutputCompressorClassWhat is the role of classes?

Options:

A.  

AssumeSmapinput compression method

B.  

set upmapHow the output is delivered

C.  

set upmapoutput compression method

D.  

set upreduceoutput compression method

Discussion 0
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