It's DataScienceJayhereandtoday I wanttotalkaboutsomecommonbehavioralinterviewquestionsfordatascientistsandmachinelearningengineersandhowwecananswerthem.
Soforbehavioralinterviewsthere's a lotofvideosoutthereabouthowtoanswerthemandhowtoactuallybegoodatthemandthoseareallgreatbuthowdoweactuallycommunicatethemspecificallyfordatascientistsandmachinelearningengineersoranyoneelseworkingindata.
Thereasonwhythat's happeningisbecause a lotofthehiringmanagersandexecutivesfigureoutit's basically a wasteoftimeifyoupassallthetechnicalinterviewsbutthenonthelastbehavioralinterviewyoufailbecauseofthefactthatyouhavetopassalltheinterviewstoactuallygettheoffer.
Let's gooveranexampleofwhen I wasactually a hiringmanageroncefor a priorcompanyandaskedanintern a behavioralinterviewquestionthattheydidn't reallypass.
私が以前の会社で採用マネージャーをしていたとき、インターン生に行動面接の質問をしたことがある。
Itwasactually a prettysimplequestion.
実に簡単な質問だった。
I askedthedatascienceinterncandidate, tellmeabout a projectthatyou'reproudofandthenthecandidaterespondedwith a lotofenthusiasmbuttheyrespondedwithananswerlikethis.
I meanobviouslythere's a finelinehere I don't wantyoutogetsupergranulartellingmeaboutthefunctionsyouuseandthecodebaseandstufflikethatbutgenerallyit's aboutdemonstratingthatyouactuallydidtheprojectthatyouhavethetechnicalexpertisetodoitagainandthefactthatyouusestrategiesanddifferentkindsofframeworkstohelpyounavigatethroughtheprojectwhileworkingwithotherteammembers.
Thebestanswerstobehavioralinterviewquestionslikethesearetoframeitin a storyand I knowwehaveallthesedifferentkindsofframeworkslikeSTARtoactuallygothroughthesituation, task, action, resultandthosearegreattousebutlet's gothroughanexampleofhow I'd actuallyanswerthisinterviewquestionif I wasaskedit.
Tellmeabout a timethatyouusedatasciencetomakeanimpactonthebusiness.
データサイエンスを活用してビジネスにインパクトを与えたときのことを教えてください。
That's a greatquestion.
いい質問だね。
SoatmycompanycalledJobberbasicallyitwas a tinderstyleswipingappsoyouwouldswiperighttoapplytojobsandyouswipeleftpassonjobsandmyjobas a datascientistwastoimprovetherecommendationengine.
Theexistingmodelthatwasusedintherecommendationenginebeforewasthisnaivebayestrainedmodelanditworkedallrightbut I feltliketherecouldhavebeenimprovementstoitbecauseofthefactthatweweregetting a lotofcustomercomplaintsaboutthemodelrecommendationswhentheywoulduploadtheirresumeandtheyget a bunchofjobsthatdidn't actuallymatchuptowhattheywerelookingfor.
Soinstead I builtanelasticsearchmodelthatactuallytook a lotofthesynonymsfromtheirresumeandthenaddedittotheelasticsearchqueryparametertoreturnbetterjobsandalsomorejobssotheywouldn't actuallyrunoutofjobsfromthepreviousmodel.
Weneeded a newrecommendationengineandthatwasmyjobtosolveit.
私たちには新しい推薦エンジンが必要で、それを解決するのが私の仕事だった。
Then I wentintothedetailsonexactlyhow I solveditbybuildingthisnewelasticsearchqueryengineandattheveryend I justdetailedtheresultsofwhathappenedandhowwelauncheditandwhatthebusinessimpactactuallygave.
A lotoftimes I hearthesestoriesfromcandidatesandjusthonestlymymindgoeselsewherebecauseyouknow I havebetterthingstodo.
多くの場合、候補者からこのような話を聞くが、正直なところ、私の心は他に移ってしまう。
I washiringdatascientistsbutifyoumakeyouractualstoryengagingifyouactuallytrytoaddsomestructuretoityourbehavioralinterviewquestionanswerswillgo a lotsmoother.
A couplemorebehavioralinterviewquestionsarereallycommontodatascientists.
データサイエンティストには、さらにいくつかの行動面接の質問が本当に一般的です。
I wanttorunthroughthesereallyquickly.
本当に手短に済ませたい。
Tellmeabout a timethatyouhadtocleanandorganize a bigdataset.
大きなデータセットのクリーニングと整理をしなければならなかったときのことを教えてください。
Howhaveyouuseddatatoelevatetheexperienceof a customerorstakeholder.
顧客や利害関係者の経験を向上させるためにデータをどのように活用したか。
Tellmeabout a timeyouhadtocommunicatesomethingtechnicalto a non-technicalpersonandthenhowwouldyoucommunicatedatadriveninsightsto a businessstakeholder.
So a lotoftime I'm prettycriticalofsomeone's resumeespeciallybecauseofthewaythatanyonecankindofaddanythingtotheirresumewithout a lotofbackingtoitandsooneofthekeythings I doas a datasciencehiringmanagerwasistobasicallygothroughandactuallyaskveryspecifickeypointsabouttheirresumethattheylistedbelow.
Forexampleonce I wasaskedtointerview a candidatewhosaidontheirresumethattheyhadincreasedthecompanybaselinerevenueby 30% monthovermonth.
例えば、ある候補者の履歴書に「前月比30%増収」と書いてあった。
I wasprettyskepticalaboutthisbut I keptonaskingquestionsandturnsoutthebusinesswasan e-commercebusinessandthemonthovermonthchangewasfromNovembertoDecemberwhichasyouknowisChristmasbuyingshoppingseason.
Sothecorekindoflearninghereisreallyjusttobackupyourresumeandhave a storyandmakesurethatit's soundproofandtightforeverysinglepointthatyouputonyourresume.
Ifyouworkinananalyticscapacitywhereyou'reverybusinessfocusedmakesureyou'renotinflating a lotofthosenumbersoratleastthatyouhave a waytobackexactlywhatyoucontributedtowithinanalytics.
Similarlyifyou'rein a machinelearningrolekindoffocusmakesurethatyouknowexactlythetechnicaldetailsofthemachinelearningprojectsorthetechnicalprojectsthatyouimplemented.
IfyouputneuralnetworksinyourresumeorsomethingaboutPyTorchand I know a lotaboutPyTorchthen I'm goingtoaskyou a lotaboutitandexpectthatyouhavethatsamelevelofknowledge.
Generallyifyoucan't explainyourresumeverywelltoaninterviewerthat's a hugeredflagandprobablyoneofthebiggestredflagstherearebecausethenpeoplethinkyoumightbelyingaboutotherthingsaswell.
Lastly a lotofthesebehavioralinterviewquestionsfordatascientistscomearoundandculturefitis a hugeissuefortechnicalcandidatesbecause a lotofthetimesyougetthesereallyreallystrongtechnicalcandidatesbutthatarereallyreallybadatcommunicationorworkingwellwithothersandsogenerallyformostoftheseculturefitquestionsthey'retestingyouon a couplethings.
Ifyou're a seniorcandidatetheywanttoknowthatyoucanactuallymentorjuniorteammembersonthesameteamandthenthreeifyou'remoreof a juniorcandidatetheywanttoknowthatyou'reeagertolearnandyoucandemonstrateinitiativeforgettingbetterinyourrole.
Thesadrealityofitisthat a lotofthesecompanieshavedifferentculturalcharacteristicsforhowtheyruntheircompaniesandthisisimportantforyouas a candidatealsotofigureoutbecauseitmightnotbethesameculturalfitthatyou'realignedwith.
Forexampleonecompanymightreallyreallyenjoycross-functionalcommunicationandalso a lotofmeetingsbutifyou'rethepersonwhodoesn't likemeetingsandreallylikestofocusonthecodebaseorpumpingoutgoodcodethenitmightnotbe a greatculturalfitandyoushouldalsoexcuseyourselffromtheinterviewprocessthenaswell.
Probablythemostcommoninterviewquestionsthatcomewiththisaremoresoaroundthesituationalkindofstarframeworktypeofquestionswhereyoucantalkaboutsituationswhereyoudemonstratedleadershiporinitiativetoreallymakeyourselfseemlike a reallygoodculturalfitandteammember.
Soexamplesaretellmeabout a dataprojectthatyou'veworkedonwhereyouencountered a challengingproblem, howdidyourespond, howhaveyougoneaboveandbeyondthecallofduty, tellmeabout a timethatyoufailedandwhatyoulearnedfromit, howdidyouhandlemeeting a tightdeadline, tellmeabout a timewhenyouresolved a conflict, provideanexampleof a goalyoureachedandtellmehowyouachievedit.
Numbertwoistomakesuretobackupyourresumeandmakesureitdoesn't haveanyredflagsonitandnumberthreeisjusttooverallassessculturefitinthebestwayyoucandemonstratethatyoucanshowinitiativeandbe a goodteammemberwithotherpeopleontheteam.
Itisprobablythebesttechnicaldatascienceinterviewplatformoutthereandwhilewe'reabouttolaunchbehavioralinterviewquestionsonthesitewehaven't yetbutifyou'regettingreadyfor a technicalinterviewbesuretocheckusout.