Pentaho interview question and answers

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Pentaho Interview questions and answers
1. ExplainPentaho?
- Pentahoaddressesthe barriersthatblockyour
organization’sabilitytogetvalue fromall your
data. Our platformsimplifiespreparingand
blendinganydataand includesaspectrumof tools
to easilyanalyze,visualize,explore,reportand
predict.Open,embeddable andextensible,Pentaho
isarchitectedtoensure that eachmemberof your
teamfrom developerstobusinessuserscaneasily
translate dataintovalue.
2. Mentionmainfeaturesof Pentaho?
- DirectAnalyticsonMongoDB:Pentahoempowers
businessanalystsandITto access,analyze,and

visualize MongoDBdata‘at the source’ withself-
service dragand droptools.Thisnative
integrationleveragesthe MongoDBAggregation
Framework,ReplicationandTagSetsfor direct
analysisonMongoDB collectionswithnoimpacton
throughput.Withnocodingrequired,organizations
can unleashthe value of theirMongoDBdata for
analyticsat scale. – PentahoData– Science Pack:
Pentaho’sDataScience Packoperationalizes
predictive modelingandmachine learningwhile
allowingdatascientistsanddeveloperstooffload
the labor of data preparationtoPentahoData
Integration.The PackincludesPDIpluginsforR
ScriptExecution,WekaScoring,andWeka
Forecasting.

- Full YARN SupportforHadoop: Pentaho’sYARN
integrationenablesorganizationstoexploitthe
full computingpowerof Hadoopwhile leveraging
existingskillsetsandtechnologyinvestments.
Together,PentahoandYARN allowITto designand
execute highperformance dataorchestrationwithout
coding,whichleadstomore rapidresultsfromBig
Data engineeringandblending.
3. What is the PentahoBIProject?
- ThePentahoBIProjectisanongoingeffortbythe
OpenSource communitytoprovide organizationswith
best-in-classsolutionsfortheirenterprise
BusinessIntelligence (BI) needs. The PentahoBI
Projectencompassesthe followingmajorapplication
areas:

Reporting
Analysis
Dashboards
Data Mining
BusinessIntelligence Platform
4. Who benefitsfromthe PentahoBIProject?
Java™ developerswhocanuse projectcomponentsto
rapidlyassemblecustomBIsolutions
ISVswhocan enhance the value andcapabilityof
theirsolutionsbyembeddingBIfunctionality
End-Userswhocan rapidlydeploypackagedBI
solutionswhichare eithercompetitiveorsuperior
to traditional commercial offeringsata
dramaticallylowercost
The PentahoBI Projectteamwhoare free topursue
theirpassionforBI while beingapart of the Open
Source movementwhichisrevolutionizingthe

software industrytobetterserve users
5. Where doesthe name Pentahocome from?
- Allegedlyfromthe PentahoIndians,whomight
have settledinFloridainthe eighteenthand
nineteenthcenturies,andmayormay not have been
responsible fordomesticatingthe WestIndian
Manatee.Accordingto some reports,priortothe
mid-nineteenthcentury,manateeswere aggressive
animals;fasterthana porpoise,withabelligerent
nature and a penchantforgrabbingoars and tipping
canoes.Some accountsassertthat the manatee
problembecame sosevere thattrade and
communicationalongthe waterwaysof Floridabecame
almostimpossible.
The allegedPentahoIndians,inanattemptto

improve communicationandtrade amongstIndian
nations,setaboutto tame the wildmanatees.After
identifyingthe highcaffeinecontentof water
hyacinthas a primaryfactor, theyinventeda
selectivebreedingprogramforthe aquaticplantto
remove the stimulantfromthe disruptive mammal’s
diet.Theywere sosuccessful thattodaythe
manatee isa slowmoving,docile animal.The
PentahoIndianshave neverbeengivencreditinthe
historybooksforthisunbelievable feat,possibly
because we made themup.Or perhapsNot.
6. What if I or my organizationwantstodistribute
software thatembedsthe PentahoBIPlatformto
customers?

- The current version2alpha release of the
PentahoBIPlatform,aswell asfuture versions,
will be distributedunderthe termsof the GNU
General PublicLicense Version2(GPLv2).Under the
GPL, if you intendtodistribute GPL-licensedcode
to yourcustomersas part of othersoftware you
have created,youmay,dependingonthe software
youhave created,be requiredtoGPL that code.
Companiesthatwishtodistribute the PentahoBI
Platformhave the optionof purchasingacommercial
license fromPentahoCorporation.A commercial
license wouldexemptyoufromGPLobligations.
7. Is Pentahoa Trademark?
- Yes,Pentaho,itslogodevice,PentahoBI,the

PentahoBIProject,andother relatedtermsare all
trademarksthat are ownedbythe company.Trademarks
and the resultingbrandsare an importantasset,
especiallytoanOpenSource project.
8. What is PentahoMetadata?How doesit work?
- PentahoMetadataisa feature of the PentahoBI
Platformdesignedtomake iteasierforusersto
access informationinbusinessterms.WithPentaho’s
opensource metadatacapabilities,administrators
can define alayerof abstractionthat presents
database informationtobusinessusersinfamiliar
businessterms.Administratorsidentify
relationshipsbetweentablesinthe database,
create business-language definitionsforcomplex or

crypticdatabase tablesandcolumns,set security
parameterstolimitdataaccess to appropriate
users,specifydefaultformattingfordatafields,
and provide additional translationsforbusiness
termsfor multi-lingual deployments.Businessusers
can thenuse Pentaho’snewadhoc query
capabilitiestochoose the specificelementsthey
wouldlike toinclude inagivenreport,suchas
orderquantitiesandtotal spendingbycustomer
groupedbyregion.The SQL requiredtoretrieve the
data isgeneratedautomatically.
9. Why is Pentahousingthe General PublicLicense
(GPL) for the PentahoBIPlatform?
- The GPL isthe most widelyusedopensource

software license.Currently,more than60% of open
source projectstrackedon freshmeat.orgare GPL-
licensed.The GPLiswell understoodbythe market
and the legal communityandhasnotable precedents
such as MySQL, Javaand the Linux kernel asGPL-
licensedprojects.Because the GPLiswhat’sknown
as a “reciprocal license”itensuresthatthe
software isopenandremainsopen.
10. What isthe PentahoReportingEvaluation?
- PentahoReportingEvaluationisaspecialized
package of a subsetof the PentahoReporting
capabilities,designedfortypical first-phase
evaluationactivitiessuchasaccessingsample
data, creatingandeditingreports,andviewingand

interactingwithreports.ItincludesPentaho
platformcomponents,the PentahoReportDesigner
and an ad hoc reportinginterface bundledintoa
single downloadintendedforlocal installation.
Sample OLAPreportsanddashboardexamplesare also
includedforthose interested,butthe package
includesthe designtoolsandpublishing
capabilitiesforPentahoReportingonly.
What's the difference betweentransformationsand
jobs?Postanswer
1
How to doa database joinwithPDI?PostanswerShow
1
How to sequentialize transformations?Post
answerShow
1
Whenrunninga Transformation,the dialoghastwo

tables,one forArgumentsandone forVariables.
What isthe difference betweenthe two?Post
answerShow
1
How to use database connectionsfromrepository?
PostanswerShow
1
How doyou insertbooleansintoaMySql database,
PDI encodesabooleanas'Y' or 'N' and thiscan't
be insertintoa BIT(1) columninMySql.Post
answerShow
1
Whenyoucreate a normal database connection,you
have to editthe transformationorjobto connect
to a differenthostordatabase.Howcan I make
thisa variable?PostanswerShow
1
By defaultall stepsinatransformationrunin

parallel,howcanI make itso that 1 row gets
processedcompletelyuntil the endbefore the next
row isprocessed?PostanswerShow
How doyou duplicate afieldinarow ina
transformation?PostanswerShow
1
Why can't I duplicate fieldnamesinasingle row?
PostanswerShow
I've got a transformationthatdoesn'trunfast
enough,butitis hard to tell inwhatorderto
optimize the steps.WhatshouldIdo?Post
answerShow
We will be usingPDIintegrated inaweb
applicationdeployedonanapplicationserver.
We've createda JNDIdatasource inour application

server.Of course Spoondoesn'trunin the context
of the applicationserver,sohowcan we use the
JNDIdata source in PDI?PostanswerShow
The Text File Inputstephasa Compressionoption
that allowsyoutoselectZipor Gzip,but itwill
onlyreadthe firstfile inZip.Howcan I use
Apache VFSsupportto handle tarballsormulti-file
zips?PostanswerShow
ExplainPentahoDataIntegrationarchitecture?
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Pentaho interview question and answers

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Pentaho interview question and answers