EMT Practice Test

1. Question Content...

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Question1: SparkThe calculation logic of the application will be parsed orDNG, this parsing operation is completed by which of the following function modules?

Question2: Which of the following scenarios is notflinkWhat does the component excel at()?
(multiple choice)

Question3: FusionInsight HDproduct, aboutKafkaThe component statement is correct?
(multiple choice)

Question4: existSparkmiddle,SparkSQLis an independent module that does not depend onSparkCorefinish independentlySQL Statement parsing, optimization, and execution.

Question5: existFusionInsight HDin the cluster,FlumeWhich service does not support writing collected data to the cluster?

Question6: .existFusionInsight HDin, useSparkSQL, which of the following methods (or tools) can be used to performSQLstatement?
(multiple choice)

Question7: FusionInsight HD a completeStreaming CQLWhich of the following parts does the application contain at least? (multiple choice)

Question8: MapReduceIn which of the following is the task ultimately performed?

Question9: existFusionInsight HDclient, executeskinit{account number}command is to getKDCwhich of the item content?

Question10: forFusionInsight HDplatformHBasecomponent, adding a secondary index needs to define the secondary index Which properties? (multiple choice)

Question11: Spark SQLIn the table, there are often many small files (the size is much smaller thanHDFSblock size), in this case,Sparkwill enable aTaskto process these small files, whenSQLexist in operationShufleWhen operating, will greatly increasehashThe number of dynamic buckets will seriously affect the performance.

Question12: FusionInsight HDin the platform,HBaseSecondary indexes are not currently supported.

Question13: FlinkusecheckpointThe mechanism guarantees fault tolerance in the operation of the application.

Question14: aboutFusionInsight HDplatformHiveservice, itsWebHCatDevelopment interface, the following description does not the correct one is?

Question15: existFusionInsight HDproductSolrDuring application development, you canSolr Admin UIrightCollectiondo some tests certificate.
Below aboutSolr Admin UIIs the statement correct? (multiple choice)

Question16: existFusionInsight HDThe key to the product38-by5Taste+Taste4Tian QiyaSWhen the armor is developed, you can pass the passSolr Admin UIxrightCollectionDo some verification. Below (multiple choice)

Question17: aboutFlumeWhich of the following descriptions is correct?

Question18: An application requires simultaneous and twoFusionInsightCluster interaction: both need to access the cluster1ofHBase Serve,Xneed to cut county2ofHiveservice, then which of the following operations is necessary? multiple choice)

Question19: 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)

Question20: For multiple business sharingrowkey, What are the countermeasures for situations that lead to conflicting data access?
(multiple choice)

Question21: Flumesupport real-time data collectionsourceWhich is the type?

Question22: What is wrong?

Question23: Flumebranch__________real-time data collectionsourceWhich is the type?

Question24: 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.

Question25: existSpark, assuminglinesIs anDStreamobject,filterStatements can be filtered out80%the number of According to the following two sentences, the law is correct:X:lines.filter( ).groupByKey(.)Y:
lines.groupByKey( ).filter( )

Question26: 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?

Question27: FusionInsight HDofHiveIn the application, there are the following scenarios:? ? ?Storage files have higher?
?efficiency, and most
Minute? ?Only a part of the letter is involved in the file, this scenario is suitable for using a column file (ORC F??)storage.

Question28: FusionInsight HDWhich of the following belong toOozieofMapReduce Actionconfiguration item? (multiple choice)

Question29: FusionInsight HDsystem, aboutHiveofJDB, CInterface type, which of the following descriptions is correct?

Question30: Which of the following application scenarios mainly generate unstructured data?
(multiple choice)

Question31: The user wants to develop an application to accessHBaseservice, first apply for a machine accounttester1, and give it sets accessHBaseservice permissions; then download the account'skeytabfile, and use that account to run the application use. Subsequent applications of this application will increase business requirements and require access toHiveservice, then givingtester1User additionally granted access askHiveAfter the component permissions, you need to re-download the user'skeytabdocument.

Question32: aboutKafkaInsufficient disk capacity alarm, which of the following analysis is incorrect for the possible reasons?

Question33: for running onMapRestoeThe application on the platform, on which this application is basedjarpackage is placed where?

Question34: existSparkmiddle,SparkSQLis an independent module that does not depend onSparkCoretstandtasQaon.eaR.
operation, etc.

Question35: aboutKafkaofProducer, is the following statement correct? (multiple choice)

Question36: 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?

Question37: FusiontnsightHD in which ways can you viewOozieDebug results of the job? (multiple choice)

Question38: FusionInsightHDin, aboutHivepartition (partation) function, which is wrong as described below?

Question39: FusionInsight HDmiddle,HiveWhich of the following parameters of the client is used to controlreduceConcurrency? (multiple choice)

Question40: Spark Streamingavailable fromKafkaReceive data and perform calculations, and the calculation results can only be stored inHDFS, can't write backKafka.

Question41: in aMapReduceapplication,mapThe output of the function is viaMapReduce? ?After processing, send toreduceletter number. This process belongs to? ?Sort and group pairs.

Question42: existSpark, the accumulator can realize high-speed parallel counter and variable summation; inSparkduring application development, only inDriverGet the value of this counter on .

Question43: existFusionInsight HDUnder the client, to runMapReducegenerated by the applicationjarBag. Which command can be executed?

Question44: existHBaseWhich of the following interfaces or classes does not need to be involved in the implementation of business logic for writing data?

Question45: HDFSIn application development of , which of the following fields areHDFSInterfaces supported by the service? (multiple choice)

Question46: FusionInsight HD in which ways can you viewOozieDebug results of the job? (multiple choice)

Question47: Fasionlrnight HD Heenein the group,Table1GenusFNamespacel,Table2GenusFNamespace2, Table1there are two1columns, respectivelyRdf11.df12,TablezThere is a column home namedf21, then which of the following user account9AAt the same time have|ef18d21oftwrite rights. (multiple choice)

Question48: When the cluster is normal,RedisClient initiates oncegetCall, the client has () times of message interaction with the server?

Question49: HDFSmiddleNameNodeUsed to store metadata for the file system.

Question50: existFusionInsight HDproductSolrDuring application development, you canSolr Admin UIright CollectionDo some verification. Below aboutSolr Admin UIIs the statement correct? (multiple choice)

Question51: existHBaseWhich of the following interfaces or classes does not need to be involved in the implementation of business logic for writing data?

Question52: FusionInsightHD which components are provided externallySQLor classSQLability? (multiple choice)

Question53: FusionInsight HDin, belonging toStreamingWhat are the methods of data distribution?
(multiple choice)

Question54: forN(N>1) copies of stored files,HDFSThe client initiates a read file request, if the read If the replica node fails, the failure will be returned directly, and it will not be read from other replica nodes.

Question55: HDFSThe system time of the node where the client is located is the same as theFusionInsight HDThe system time of the cluster should be consistent. If there is a time difference, So the time difference should be less than a few minutes?

Question56: SparkWhat kind of parameter setting methods does the application have? (multiple choice)

Question57: Spark StreamingAs a micro-batch stream processing engine, it converts the data of each time slice into aRDDmiddle A partition is calculated.

Question58: existKafkain, aboutConsumerWhich statement is correct? (multiple choice)

Question59: existKafka, as follows aboutProducerWhat is wrong with the statement of sending data? (multiple choice)

Question60: HBaseofRegionWhich service process is managed?

Question61: Fusionlnsigt HD one deployed inTomcatapplication on theHBaseservice, it is recommended to use in this scenario machine account.

Question62: FusionInsight HDin the system,hiveWhat are the supported interface types?

Question63: Flumesupport real-time data collectionsourceWhich is the type?

Question64: FusionInsight HDmiddle,StreamingPackaging tools are used to package business codejarpackages and other dependenciesjarpackage, etc. a completeStreamingAppliedjarBag

Question65: 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.

Question66: which come downRedisIs the command an atomic operation?

Question67: existSpark, which of the following is trueDataFrameThe operator that takes the intersection?

Question68: existSpark, assuminglinesIs anDStreamobject, which of the following statements can periodically count this number of words on a stream?

Question69: FusionInsight HD assuming a topology, set the roadspoutConcurrency is3,bolt1Concurrency for2,bolt2Concurrency is3,workerThe number is2,Sobolt1ofexecutorexistworkerhow to divide Cloth?

Question70: Fusioninsight HDmedium, applicablestreamingSubmit by command lineexample.jarmiddle om.huawei.example.wordcounttask, task name iswcTest, is the following execution command correct?

Question71: existSpark, which of the following statements about broadcast variables is correct? (multiple choice)

Question72: existFlumeDuring the cascade transfer process, you can usefailovermode transmission, so that if startled ofFlumeWhen the node fails or the data is received abnormally, it can automatically switch to another path to continue transmission

Question73: forSpark Streamingapplication, in aJVM, there can only be one at a timeStreamingContextactive condition.

Question74: FusionInsight HDin, aboutOozieWhich of the following descriptions is correct?
(multiple choice)

Question75: FusionInsigt HDWhat distributed computing frameworks do big data platforms provide?
(multiple choice)

Question76: Which of the following causesHDFSofNameNodeEntersafemode(safe read-only mode)?
(multiple choice)

Question77: Suppose there is an application that needs to be accessed frequentlyOracleThe user table in the database, in order to improve performance, introduce Redisto cache user information. For this scene,RedisWhich of the following is the best data structure choice for ?

Question78: Hadoopin the systemYARNWhat resource types are supported for management?
(Multiple Choice)

Question79: 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.

Question80: A project requires Internet access to a certain area? ?Save it, and search the full text of these Internet records to see if there is any? ?information, with to prevent crime in the region.
In this scenario, which of the following options is the best?

Question81: FusionInsight HDmiddle,OozieBefore submitting the job, you need to upload the configuration files andjarpackage toHDFS

Question82: KafkaIt is a distributed message publishing and subscribing system. It only forwards messages and does not guarantee save message.

Question83: HDFSclient withNcopy toHDFSWhen writing a file, if one of the copies fails to write, all If there is a copy, it will return a failure.

Question84: FusionInsight HDin, aboutLoaderIs the job description correct?

Question85: SparkandHadoopNeither is suitable for iterative calculation scenarios.

Question86: FusionInsight HDmiddle,StreamingPackaging tools are used tojarpackages and other dependencies jarpackage, etc., typed into a completeStreamingAppliedjarBag

Question87: When the cluster is normal,RedisClient initiates oncegetCall, the client and the server have () secondary message interaction?

Question88: Which of the following is notMapReducespecialty?

Question89: HDFSRuntime,(NameNodeAt startup,)NameNodewill file system metadata from The disk is all loaded into memory, so the total number of files that the file system can store is limited byNameNodeof memory capacity.

Question90: Fusionlnsigt HDWhat distributed computing frameworks do big data platforms provide? (multiple choice)

Question91: 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.

Question92: there are the following scenarios: new data is generated by the online system every day500G, it is necessary to analyze these data by day, week, Monthly and other dimensions for statistical summary. ask if it is suitable for useHiveWhat kind of table to handle?

Question93: existFusionInsight HDclient, executeskinit{account}command is to getKDCwhich content?

Question94: HDFSclient withNWhen a copy writes a file, which of the following is true about the writing process?
(multiple choice)

Question95: TowardsHBaseincrease in the clusterRegionServerhost, the original cluster must be stopped first, becauseHBaseDynamic expansion is not supported.

Question96: RedisofLISTData structure, suitable for which of the following scenarios? (multiple choice)

Question97: FusionInsigt HD which of the following components can be used for data collection? (multiple choice)

Question98: Tonganeng's societyHDofe, user-definedUDFcan andHmachine built-inUDFclass name, In this case, the user-definedUDF.

Question99: aboutKafkaThe characteristics of the following description are correct? (multiple choice)

Question100: 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 ?

Question101: HDFSused is"Write once, read many"file access model. So it is recommended that a file be created, written and closed After closing, do not modify it again.

Question102: Fusioninsight HDin, yessolrThe creation and read and write permissions of various resources are applicable.
Which of the following statements is wrong?

Question103: FusionInsight HDWhich of the following belong toOozieofMapReduce Actionconfiguration item? (multiple choice)

Question104: FusionInsight HDin, useStreamingThe command?way to submitexample.jarmiddleom huawei example.
WrodCounttask, task name iswcTeat, is the following execution command correct?

Question105: existSolrWhen indexing, which of the following code snippets can significantly improve indexing performance? (multiple choice)

Question106: Spark Streamingavailable fromKafkaReceive data and perform calculations, and the calculation results can only be stored inHDFS, can no longer be written backKafka.

Question107: RedisofLISTData structure, suitable for which of the following scenarios? (multiple choice)

Question108: aboutStreamingdisaster recovery capability, which of the following statements is correct? (multiple choice)

Question109: existSpark, assuminglinesIs anDStreamobject,filterStatements can be filtered out80%data for the following two The correct statement is:
X: lines.filter(...).groupByKey(...)
Y: lines.groupByKey(...).filter(...)

Question110: forHiveWhich of the descriptions about normal tables and external tables is incorrect?

Question111: Does a project require Internet access to a certain area? ? Save and search the full text of these Internet records? ? information, with to prevent crime in the region.
In this scenario, which of the following options is the best?

Question112: existMapReduceDuring application development,setMapOutputCompressorClassWhat is the role of classes?

Question113: forSpakstreamingapplication, in aJVM, there can only be one at a time
Streamingcontextis active.

Question114: FusionInsight HDmiddle,OozieBefore submitting the job, you need to upload the configuration files that this job depends on andjarpackage toHDFS

Question115: existFusionInsight HDofHBase, which of the following scenarios will not triggerFlushoperate?

Question116: Which of the following business applications is notHiveApplicable scenarios?

Question117: existKafkamiddle,ProducerThis can be done by configuring the synchronization parameters (producer.type), to ensure that the data press

Question118: Fusionlngight HDin the system,SolkaExample projectsdk-sxamgelconlf\udlr-eamgple propertyamiddleZX.URLandZ0OKEEPER DEFAULT SERVER PRINCIPLThe value can be obtained from the following Which is the quickest pick?

Question119: pass throughHBaseofcreateTableThe method creates a table, what parameters must be passed in?

Question120: Fusionlnsigt HDofHiveWhat distributed computing frameworks can components run on? (multiple choice)

Question121: 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)

Question122: existMapReduceDuring application development,setMapOutputCompressorClassWhat is the role of classes?

Question123: FusionInsight HDmiddle,HiveWhich of the following parameters of the client is used to controlreduceConcurrency? (multiple choice)

Question124: FusionInsigt HD which of the following components can be used for data collection? (multiple choice)

Question125: Which of the following causesHDFSofNameNodeEntersafemode(safe read-only mode)? (multiple choice)

Question126: existFusionInsight HDin, aboutHivepartition (partition) function, which is wrong as described below?

Question127: Hadoopin the systemYARNassigned toContainerThe memory size, which can be passed through the parameter yarn.app.mapreduce.am.resource.mb(yarn.nodemanager.resource.memory-mb) to set.
( )

Question128: HuaweiFusionInsight HDin the cluster,SparkFrom which of the following services can a service read data?
(multiple choice)

Question129: about the followingHBaseofBloomFilterCharacter understanding, which statement is incorrect?