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Ravi Katam
Ravi Katam

1. Hive will create a directory for databases and files for tables. 2. To run jobs in parallel in Oozie, the required node is <forkname=> which allows parallel execution. 3. filter() is an action in Spark, not a transformation. 4. MongoDB can be installed on UNIX, Windows, or Linux.

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1.Hivewillcreate Selectone: a.Directoryfordatabasesandfilesfortables b.Filesfordatabasesandfilesfirtables c.Filesfordatabasesanddirectoryfortables d.Directoryfordatabasesandsubdirectoryfortables 2.Torunjobsinparallelinoozietherequirednodeis Selectone: a.<forkname=> b.<startto=> c.<caseto=> d.<okto=> 3.WhichofthefollowingisnottrueincontextofSpark Selectone: a.distinctisatransformation b.reduceisanaction c.map()isatransformation d.filter()isanaction 4.MongoDBcanbeinstalled Selectone: a.OnUNIX b.OnWindows c.OnLinux
d.Onanyofthementionedoptions 5.InCassandrawhenahintedhandoffoccurs? Selectone: a.Whenanodeisbusyduringread b.Whenanodeisofflineduringread c.Whenanodeisbusyduringwrite d.Whenanodeisofflineduringwrite 6.InPigfragmentreplicatejoinmeans Selectone: a.Jointwotablesfirstbriningbothinmemory. b.Joinonesmalltableinmemoryandonelargetablefromdisk c.Jointwolargestablesinfragmentedway d.Joinonelargetableinmemorywithonesmalltableindisk 7.WhichofthefollowingistrueincontextofpySpark Selectone: a.YoucanworkwithoutanySaprkContextandsoitisnotnecessarytocreateone. b.ASparkContextisalreadycreatedforuseandyoucannotcreateanewoneevenif youwant c.NoSparkContextiscreatedautomaticallyanduserhavetocreateitbeforeuse d.ASparkContextisalreadycreatedforusebutyoucancreateanewoneifyouwant 8.Hiveisbestsuitedfor Selectone:
a.OLTP b.Realtimequeries c.Allofthementioned d.OLAP 9.InpySparkbroadcastvariablesare Selectone: a.Bothreadandwritevariablessendtoworkersonlywhenthedemandit b.Bothreadandwritevariablessendtoallworkers c.Readonlyvariablessendtoallworkers d.Readonlyvariablessendtoworkersonlywhentheydemandit 10.Suppose,youaregiventwovariablesX,Y.ThePearsoncorrelationcoefficientsfor(X, Y)isP1.Now,youhaveadded2inallvaluesofX,subtracted3fromallvaluesofY.The newcoefficientsfor(X,Y)isP2.Thenwhichofthefollowingistrue Selectone: a.P2=P1+2 b.P2=P1 c.P2=P1-1 d.P2=P1-3 11.WhatisthenameofdefaultdatabaseinmongoDB? Selectone: a.test b.local c.Thereisnodefaultdatabase d.default
12.WhenyoutrytoinsertnewrecordsincappedcollectioninmongoDBabovethemax value,whichofthefollowingwillhappen Selectone: a.Neitheritwillinsertrecordnoritwillgenerateerror. b.Itwilloverwritetheoldestrecordinthecollection c.Itwillinsertrecordtooverflowareawithwarningmessage. d.Itwillnotinsertrecordandgenerateerrormessage. 13.InHbaseeachHtablecontains#controversy Selectone: a.Datafromonecolumn b.Datafromforethanonecolumnfamilydependinguponthreshold c.Datafromonecolumnfamily d.Datafrommorethanonecolumndependinguponthreshold 14.Insparkthecommandrddval=sc.parallelize(value,4)means Selectone: a.Runrddvalin4cores b.Createtherddvalwith4partition c.Runrddvalinparallelin4threads d.Allthementionedaretrue 15.TobreakthedatainmoremanageablechunksinHivethebesttechniqueis Selectone: a.Bucketing b.Itdependsofthecolumnonwhichbucketingorpartitioningwillbedone
c.EitherofPartitioningorBucketing d.Partitioning 16.InHbasetheremaybemorecolumnsundereachcolumnfamily.Whichofthe followingistrue Selectone: a.Anyofthementionedoptionwillcreateatable b.Wehavetodefinecolumnsonlyduringtablecreation c.Wehavetodefinecolumnsandcolumnfamiliesduringtablecreation d.Wehavetodefinecolumnfamiliesonlyduringtablecreation 17.AfeatureFwhichrepresentsgradeofstudentscantakecertainvalue:A,B,C,D,E, Whichofthefollowingstatementistrueinthiscontext Selectone: a.Itdoesntbelongtoanyoftheabovecategory. b.FeatureFisanexampleofnominalvariable. c.FeatureFisanexampleofordinalvariable. d.Noneofgivenaretrue 18.InteractiveshellinPigiscalledas Selectone: a.Pigexecutionengine b.Piglatin c.Piginterpreter d.Grunt 19.ItiscalledasrowinRDBMS.WhatisitequivalentinMonogoDB
Selectone: a.Fields b.Collection c.Shard d.Documents 20.>A=foreachBgenerategroup,COUNT(val); InabovePigcommandthereducephaseisstartedby Selectone: a.generate b.count c.foreach d.group 21.Machinelearningis Selectone: a.Theautonomousacquisitionofknowledgethroughtheuseofmanualprograms b.Theautonomousacquisitionofknowledgethroughtheuseofcomputerprograms c.Theselectiveacquisitionofknowledgethroughtheuseofcomputerprograms d.Theselectiveacquisitionofknowledgethroughtheuseofmanualprograms 22.Bloomfilteralgorithmisa Selectone: a.Deterministicandcangivefalsepositive b.Nondeterministicandcangivefalsenegative c.Deterministicandcangivefalsenegative
d.Nondeterministicandcangivefalsepositive 23.InPigwhichofthefollowingcollectsrecordsofmorethanoneinputsbasedonakey Selectone: a.filter b.cross c.cogroup d.group 24.nperspectiveofthisinstructioninPiginteractiveshell,whichofthefollowingis correct Selectone: a.BothforeachandAiscasesensitive b.foreachisnotcasesensitivebutAiscasesensitive c.NoneofforeachandAiscasesensitive d.foreachiscasesensitivebutAisnotcasesensitive 25.MongoDBstoresdatain Selectone: a.CSONformat b.JSONformat c.Canstoredataineitherofthementionedformat. d.BSONformat 26.Inhivewecancreateeitherofexternalofinternaltables.Whichofthefollowingis trueinthiscontext Selectone:
a.Wehavetogivethepathtofileforbothinternalandexternaltable b.Wemustgivepathifwementionexternaltablebutnopathisrequirediftheword externalisnotmentionedduringcreation. c.Weneednotgiveanypathforeitherofexternalorinternaltable,onlythewordinternal orexternalissufficient. d.Wehavetogivepathifitisinternaltablebutnopathisrequirediftheexternalis mentioned. 27.WhichofthefollowingistrueinperspectiveofindexinmongoDB Selectone: a.Itwillnotcreateindexifuserdoesntdefineit b.Itwillautomaticallycreateanindexonthefirstcolumndefinedbyuser c.Itwillautomaticallycreatean_idfieldandcreateindexonthat d.mongoDBneverusesanindex 28.WhchofthefollowingistrueinHbase Selectone: a.Anyofthementionedconfigurationwillwork b.TherearemanyHMasterserver,manyHRegionservercontrolledbyzookeeper c.ThereareoneHMasterserver,manyHRegionserver d.ThereareexactlyoneHMasterserver,exactlyoneHRegionserver 29.Topredictthenumberviewsofanonlinearticlewecanusetheauthorname,noof viewsofpastarticlebysameauthoretc.Evaluationmetricweshoulduse Selectone: a.Anyoneofthementionedwillwork b.F1score c.Meansquareerror d.Accuracy
30.ToimplementcounterswhichwillworkgloballyamongalltasksinpySparkwe shoulduse Selectone: a.Broadcastvariable b.Anyofthementionedwillwork c.Accumulators d.Globalvariable 31.zk>delete/zk/zc Selectone: a.Itmayormaynotbesuccessful b.Commandiswrong c.Itwillalwaysfail d.Itwillalwayssuccessful 32.Hivestores Selectone: a.MetadatainHDFSandprocesseddatainRDBMS b.MetadatainRDBMSandprocesseddatainRDBMS c.MetadatainHDFSandprocesseddatainHDFS d.MetadatainRDBMSandprocesseddatainHDFS 33.Whatistheentropyofthetargetvariable? Selectone: a.5/8log(3/8)¡ª 3/8log(5/8)
b.3/8log(5/8)+5/8log(3/8) c.-(5/8log(5/8)+3/8log(3/8)) d.5/8log(5/8)+3/8log(3/8) 34.InCassandradataissortedinapartitiondependingon Selectone: a.Primarykey b.Compositekey c.Partitionkey d.Clusteringkey 35.InCassandraforupdaterequestwouldgoto Selectone: a.ToanyoftheCassandranodethatisholdingreplica b.Cassandramaster c.ToanyofCassandranode d.TheCassandraslavewherethedataisthere 36.InMongoDBtocreateadatabasetestdbthecommandis Selectone: a.db.createDatabase(testdb) b.db.createCollection(testdb) c.usedefault(testdb) d.usetestdb 37.Whichofthefollowingisthecorrectmethodtocreateawatchinzookeepr
Selectone: a.zk>create/zk/watchtrue;zk&gt;set/zk/watch1; b.zk>create/zk/watch1 c.Anyofthementionedcommandwillwork d.zk>create/zk/watchtrue;zk&gt;get/zk/watch1; 38.InCassandra Selectone: a.Readisslowerthanwrite b.Dependingonsituationeitherofreadorwritecanbefaster c.Readandwritearebothofequalspeed d.Writeisslowerthanread 39.Cassandrachoosesreplicaplacementserversonthering Selectone: a.distributereplicasevenlyonallthenodesinring b.onclockwisemanner c.onrandommanner d.onanti-clockwisemanner 40.InmongoDBtofindalltherecordsstrictlylessthanavalueoneshoulduse Selectone: a.$ngte b.$lt c.$lte d.$ngt
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