1.Adatabasespecialistneedstodeleteuserdataandsensordata1yearafteritwasloadedinan AmazonDynamoDBtableTTLisenabledononeoftheattributesThedatabasespecialistmonitorsTTL ratesontheAmazonCloudWatchmetricsforthetableandobservesthatitemsarenotbeingdeletedas expected
WhatistheMOSTlikelyreasonthattheitemsarenotbeingdeleted?
ATheTTLattribute'svalueissetasaNumberdatatype
BTheTTLattribute'svalueissetasaBinarydatatype
CTheTTLattribute'svalueisatimestampintheUnixepochtimeformatinseconds
DTheTTLattribute'svalueissetwithanexpirationof1year
Answer:B
Explanation:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/TTL.html#time-to-live-ttl-before-y ou-start-formatting
2Afinancialorganizationmustensurethatthemostcurrent90daysofMySQLdatabasebackupsare accessible.AmazonRDSforMySQLDBinstancesareusedtohostallMySQLdatabases.Adatabase expertmustcreateasolutionthatsatisfiesthecriteriaforbackupretentionwiththeleastamountof developmentworkfeasible.
Whichstrategyshouldthedatabaseadministratortake?
AUseAWSBackuptobuildabackupplanfortherequiredretentionperiodAssigntheDBinstancesto thebackupplan
BModifytheDBinstancestoenabletheautomatedbackupoptionSelecttherequiredbackupretention period
CAutomateadailycronjobonanAmazonEC2instancetocreateMySQLdumps,transfertoAmazonS3, andimplementanS3Lifecyclepolicytomeettheretentionrequirement
DUseAWSLambdatoscheduleadailymanualsnapshotoftheDBinstancesDeletesnapshotsthat exceedtheretentionrequirement
Answer:A
Explanation:
https://docsawsamazoncom/AmazonRDS/latest/UserGuide/USERWorkingWithAutomatedBackupsht ml
3.Abusinessthatspecializesininternetadvertisingisdevelopinganapplicationthatwillshowadvertsto itscustomersTheprogramstoresdatainanAmazonDynamoDBdatabaseAdditionally,theapplication cachesitsreadsusingaDynamoDBAccelerator(DAX)cluster.Themajorityofreadscomeviathe GetItemandBatchGetItemqueriesTheapplicationdoesnotneedconsistencyofreadings
TheapplicationcachedoesnotbehaveasintendedafterdeploymentSpecificextremelyconsistent queriestotheDAXclusterarerespondinginseveralmillisecondsratherthanmicroseconds
Howcanthebusinessoptimizecachebehaviorinordertoboostapplicationperformance?
AIncreasethesizeoftheDAXcluster
BConfigureDAXtobeanitemcachewithnoquerycache
CUseeventuallyconsistentreadsinsteadofstronglyconsistentreads
DCreateanewDAXclusterwithahigherTTLfortheitemcache
Answer:C
4Abusinessneedadatawarehousesystemthatstoresdataconsistentlyandinahighlyorganized fashion.Theorganizationdemandsrapidresponsetimesforend-userinquiriesincludingcurrent-year data,andusersmusthaveaccesstothewhole15-yeardatasetwhennecessaryAdditionally,this solutionmustbeabletomanageavariablevolumeofincominginquiriesCostsassociatedwithstoring the100TBofdatamustbemaintainedtoaminimum
Whichsolutionsatisfiesthesecriteria?
ALeverageanAmazonRedshiftdatawarehousesolutionusingadensestorageinstancetypewhile keepingallthedataonlocalAmazonRedshiftstorageProvisionenoughinstancestosupporthigh demand
BLeverageanAmazonRedshiftdatawarehousesolutionusingadensestorageinstancetostorethe mostrecentdata.KeephistoricaldataonAmazonS3andaccessitusingtheAmazonRedshiftSpectrum layerProvisionenoughinstancestosupporthighdemand
C.LeverageanAmazonRedshiftdatawarehousesolutionusingadensestorageinstancetostorethe mostrecentdataKeephistoricaldataonAmazonS3andaccessitusingtheAmazonRedshiftSpectrum layer.EnableAmazonRedshiftConcurrencyScaling.
DLeverageanAmazonRedshiftdatawarehousesolutionusingadensestorageinstancetostorethe mostrecentdata.KeephistoricaldataonAmazonS3andaccessitusingtheAmazonRedshiftSpectrum layerLeverageAmazonRedshiftelasticresize
Answer:C
Explanation:
https://docsawsamazoncom/redshift/latest/dg/concurrency-scalinghtml"WiththeConcurrencyScaling feature,youcansupportvirtuallyunlimitedconcurrentusersandconcurrentqueries,withconsistentlyfast queryperformanceWhenconcurrencyscalingisenabled,AmazonRedshiftautomaticallyadds additionalclustercapacitywhenyouneedittoprocessanincreaseinconcurrentreadqueriesWrite operationscontinueasnormalonyourmainclusterUsersalwaysseethemostcurrentdata,whetherthe queriesrunonthemainclusteroronaconcurrencyscalingclusterYou'rechargedforconcurrency scalingclustersonlyforthetimethey'reinuseFormoreinformationaboutpricing,seeAmazonRedshift pricing.YoumanagewhichqueriesaresenttotheconcurrencyscalingclusterbyconfiguringWLM queuesWhenyouenableconcurrencyscalingforaqueue,eligiblequeriesaresenttotheconcurrency scalingclusterinsteadofwaitinginline."
5.Acompanyisreleasinganewmobilegamefeaturingateamplaymode.Asagroupofmobiledevice usersplaytogether,anitemcontainingtheirstatusesisupdatedinanAmazonDynamoDBtable Periodically,theotherusers’devicesreadthelateststatusesoftheirteammatesfromthetableusingthe BatchGetltemnoperation
Priortolaunch,sometesterssubmittedbugreportsclaimingthatthestatusdatatheywereseeinginthe gamewasnotup-to-dateThedevelopersareunabletoreplicatethisissueandhaveaskedadatabase specialistforarecommendation Whichrecommendationwouldresolvethisissue?
AEnsuretheDynamoDBtableisconfiguredtobealwaysconsistent BEnsuretheBatchGetltemoperationiscalledwiththeConsistentReadparametersettofalse CEnableastreamontheDynamoDBtableandsubscribeeachdevicetothestreamtoensureall devicesreceiveup-to-datestatusinformation
D.EnsuretheBatchGetltemoperationiscalledwiththeConsistentReadparametersettotrue.
Answer:D
Explanation:
https://docsawsamazoncom/jajp/amazondynamodb/latest/developerguide/APIBatchGetItemv20111 205html
Bydefault,BatchGetItemperformseventuallyconsistentreadsoneverytableintherequestIfyouwant stronglyconsistentreadsinstead,youcansetConsistentReadtotrueforanyoralltables
6AgamingcompanywantstodeployagameinmultipleRegionsThecompanyplanstosavelocalhigh scoresinAmazonDynamoDBtablesineachRegionADatabaseSpecialistneedstodesignasolutionto automatethedeploymentofthedatabasewithidenticalconfigurationsinadditionalRegions,asneeded ThesolutionshouldalsoautomateconfigurationchangesacrossallRegions. WhichsolutionwouldmeettheserequirementsanddeploytheDynamoDBtables?
A.CreateanAWSCLIcommandtodeploytheDynamoDBtabletoalltheRegionsandsaveitforfuture deployments
B.CreateanAWSCloudFormationtemplateanddeploythetemplatetoalltheRegions.
CCreateanAWSCloudFormationtemplateanduseastacksettodeploythetemplatetoallthe Regions.
DCreateDynamoDBtablesusingtheAWSManagementConsoleinalltheRegionsandcreatea step-by-stepguideforfuturedeployments
Answer:C
Explanation:
https://awsamazoncom/blogs/aws/use-cloudformation-stacksets-to-provision-resources-across-multipleaws-accounts-and-regions/
https://docsawsamazoncom/AWSCloudFormation/latest/UserGuide/stacksets-conceptshtml
7AdatabasespecialistdeployedanAmazonRDSDBinstanceinDev-VPC1usedbytheirdevelopment teamDev-VPC1hasapeeringconnectionwithDev-VPC2thatbelongstoadifferentdevelopmentteam inthesamedepartment.ThenetworkingteamconfirmedthattheroutingbetweenVPCsiscorrect; however,thedatabaseengineersinDev-VPC2aregettingatimeoutconnectionserrorwhentryingto connecttothedatabaseinDev-VPC1.
Whatislikelycausingthetimeouts?
A.ThedatabaseisdeployedinaVPCthatisinadifferentRegion.
BThedatabaseisdeployedinaVPCthatisinadifferentAvailabilityZone
C.Thedatabaseisdeployedwithmisconfiguredsecuritygroups.
DThedatabaseisdeployedwiththewrongclientconnecttimeoutconfiguration
Answer:C
Explanation:
"AVPCpeeringconnectionisanetworkingconnectionbetweentwoVPCsthatenablesyoutoroutetraffic betweenthemusingprivateIPaddressesInstancesineitherVPCcancommunicatewitheachotherasif theyarewithinthesamenetworkYoucancreateaVPCpeeringconnectionbetweenyourownVPCs, withaVPCinanotherAWSaccount,orwithaVPCinadifferentAWSRegion"
https://docsawsamazoncom/AmazonRDS/latest/UserGuide/USERVPCScenarioshtml
8.AcompanyisusingAmazonRDSforMySQLtoredesignitsbusinessapplication.ADatabaseSpecialist hasnoticedthattheDevelopmentteamisrestoringtheirMySQLdatabasemultipletimesadaywhen Developersmakemistakesintheirschemaupdates.
TheDeveloperssometimesneedtowaithourstotherestorestocomplete Multipleteammembersareworkingontheproject,makingitdifficulttofindthecorrectrestorepointfor eachmistake
WhichapproachshouldtheDatabaseSpecialisttaketoreducedowntime?
ADeploymultiplereadreplicasandhavetheteammembersmakechangestoseparatereplica instances
BMigratetoAmazonRDSforSQLServer,takeasnapshot,andrestorefromthesnapshot
CMigratetoAmazonAuroraMySQLandenabletheAuroraBacktrackfeature
D.EnabletheAmazonRDSforMySQLBacktrackfeature
Answer:C
Explanation:
"AmazonAurora,afully-managedrelationaldatabaseserviceinAWS,isnowofferingabacktrackfeature WithAmazonAurorawithMySQLcompatibility,userscanbacktrack,or"rewind",adatabaseclustertoa specificpointintime,withoutrestoringdatafromabackupThebacktrackprocessallowsapointintime tobespecifiedwithonesecondresolution,andtherewindprocesstypicallytakesminutes.Thisnew featurefacilitatesdevelopersinundoingmistakeslikedeletingdatainappropriatelyordroppingthewrong table"
9AdatabasespecialistmanagesacriticalAmazonRDSforMySQLDBinstanceforacompanyThedata storeddailycouldvaryfrom01%to10%ofthecurrentdatabasesizeThedatabasespecialistneedsto ensurethattheDBinstancestoragegrowsasneeded
WhatistheMOSToperationallyefficientandcost-effectivesolution?
AConfigureRDSStorageAutoScaling
BConfigureRDSinstanceAutoScaling
CModifytheDBinstanceallocatedstoragetomeettheforecastedrequirements
D.MonitortheAmazonCloudWatchFreeStorageSpacemetricdailyandaddstorageasrequired.
Answer:A
Explanation:
Ifyourworkloadisunpredictable,youcanenablestorageautoscalingforanAmazonRDSDBinstance Withstorageautoscalingenabled,whenAmazonRDSdetectsthatyouarerunningoutoffreedatabase spaceitautomaticallyscalesupyourstorage
https://aws.amazon.com/about-aws/whats-new/2019/06/rds-storage-auto-scaling/ https://docsawsamazoncom/AmazonRDS/latest/UserGuide/USERPIOPSStorageTypeshtml#USER PIOPSAutoscaling
10Avehicleinsurancecompanyneedstochooseahighlyavailabledatabasetotrackvehicleownersand theirinsurancedetailsThepersisteddatashouldbeimmutableinthedatabase,includingthecomplete andsequencedhistoryofchangesovertimewithalltheownersandinsurancetransferdetailsfora vehicle
Thedatashouldbeeasilyverifiableforthedatalineageofaninsuranceclaim
WhichapproachmeetstheserequirementswithMINIMALeffort?
A.Createablockchaintostoretheinsurancedetails.Validatethedatausingahashfunctiontoverifythe datalineageofaninsuranceclaim
B.CreateanAmazonDynamoDBtabletostoretheinsurancedetails.ValidatethedatausingAWSDMS validationbymovingthedatatoAmazonS3toverifythedatalineageofaninsuranceclaim
CCreateanAmazonQLDBledgertostoretheinsurancedetailsValidatethedatabychoosingthe ledgernameinthedigestrequesttoverifythedatalineageofaninsuranceclaim
DCreateanAmazonAuroradatabasetostoretheinsurancedetailsValidatethedatausingAWSDMS validationbymovingthedatatoAmazonS3toverifythedatalineageofaninsuranceclaim
Answer:C
11Asmallstartupcompanyislookingtomigratea4TBon-premisesMySQLdatabasetoAWSusingan AmazonRDSforMySQLDBinstance.
WhichstrategywouldallowforasuccessfulmigrationwiththeLEASTamountofdowntime?
A.DeployanewRDSforMySQLDBinstanceandconfigureitforaccessfromtheon-premisesdata centerUsethemysqldumputilitytocreateaninitialsnapshotfromtheon-premisesMySQLserver,and copyittoanAmazonS3bucket.ImportthesnapshotintotheDBinstanceutilizingtheMySQLutilities runningonanAmazonEC2instanceImmediatelypointtheapplicationtotheDBinstance
B.DeployanewAmazonEC2instance,installtheMySQLsoftwareontheEC2instance,andconfigure networkingforaccessfromtheon-premisesdatacenterUsethemysqldumputilitytocreateasnapshot oftheon-premisesMySQLserverCopythesnapshotintotheEC2instanceandrestoreitintotheEC2 MySQLinstanceUseAWSDMStomigratedataintoanewRDSforMySQLDBinstancePointthe applicationtotheDBinstance
CDeployanewAmazonEC2instance,installtheMySQLsoftwareontheEC2instance,andconfigure networkingforaccessfromtheon-premisesdatacenterUsethemysqldumputilitytocreateasnapshot oftheon-premisesMySQLserverCopythesnapshotintoanAmazonS3bucketandimportthesnapshot intoanewRDSforMySQLDBinstanceusingtheMySQLutilitiesrunningonanEC2instancePointthe applicationtotheDBinstance
DDeployanewRDSforMySQLDBinstanceandconfigureitforaccessfromtheon-premisesdata center.Usethemysqldumputilitytocreateaninitialsnapshotfromtheon-premisesMySQLserver,and copyittoanAmazonS3bucketImportthesnapshotintotheDBinstanceusingtheMySQLutilities runningonanAmazonEC2instance.EstablishreplicationintothenewDBinstanceusingMySQL replicationStopapplicationaccesstotheon-premisesMySQLserverandlettheremainingtransactions replicateover.PointtheapplicationtotheDBinstance.
Answer:B