最新国外J2EE工程师面试题

最新国外2EE工程师面试题最新国外J2EE工程师面试题集锦 sin: What s JEE? Answe: J2EE tadsfr Jv 2Eterpie EdiionJ2EE is an evrot for developing ad deploig enrriapplictios.2EE speciication defined bSunMirtemInc. Te JEE pfrm i on othe bet pafor or thedeeotddeplyment of enterpriseapplictins. The 2EE platoris onsists fa seof services,applicatio pgammng inerces （APIs), nd rotocos, hich provids t functinat ncessary for depin multi-tiered, eb-baed aplications You an dowloadthe J SDK ndevlopmen tols fo htp：/jaa.sn.cm/.Quesion： hat d ou undrstan by J2EE modue? nswe:A J2E mdle sa software unit ttcnsis ofn ormore J2E mponnts of heae contaier p long with ne eploment desiptor ohatpe J2EE specifiatin dfns fou tps o modues： )JB ) Webc） appliatioclientand d） resocadater In th JEE appliatos mdulscan bdloe tad-alon unts. Moduls canalso assembled i JEE applicatins. Quein：Telleoetnbout 2EE cpent? Answer： 2 coponen i ef-contane fuctional softare nit supoy cotaine nd configuale ateploymenttme. he J2EEspficaion dfns theollwinJ2EE omonents:* Aplication clns and appls are comonens thatru o h cint.* Jv srve and JvaSe Pg (SP) tecnolog cmponets are ebcomponnts haun on heserver. EntepiseJavaBeans (EJB) compents(entprise bans）areusiness componns tht u o the sere.2E cmnents are ttn in t Java pogammg lnuageand r comled in th me wa s anrgra inthlanguaeh diferene between J2E ponentnd ；sandar; Jav classes s that Jcompoens re semled io a J2EE appiatio, erfie to well formed a in cmpliane with thJ2EE scfction,ad depyto production, where theyare run ad mnagedby thJEEsrver o lient contne.Souce:2 v1.4 Glsary Qestion: Wat are the ctetsof we module？nswr： Awbmodue ma onain: a） JP file ）Jaa clase c） gif anht fies d) we ompo deplyent desciptrs Qesion: Dierentit between.er， .jr and.war fil.nswer: hee files re simly zped file usin jvajroo. Tee ilare retd differt prss Hres teescripio ofthesefile: .jfles: Tee fles ae ih he.jar extestion. e .jar fileontan e librrs， esous and acesories fil lik propety ils. .wr fls： hese fiesare with e.wrextnsion Th warfileotns the eb aplicain hat andpoyedoeanyervlt/js ontaiThe .arficntai js，tml, jaacritand oher fileso necesar tedevepment of ebapplcatios .ar les:Th .er file cnans EJBmodules fth applicatin.Questn: ht ihe ifere ewn Sesson Band ntitBan? Anwe: Sesson ean: Sssiis one o heEBa t represes sle clent inside te Apiaton Sver. Statlesssession i eay todevlopand ts fficent. As opare t enitybanssessio beanrequefw rr rurc. A esion bean i ilarto an interativessionnd is no shaed； itchae only one ien, nhe ae wa ha an inerativesion cn havon ner. session bean is not perssent andit is destroed one thesession trites.Entity Bean: n enity be repreentsesint gobalata rm te aabse ntiy bas dat are stored int tabase. uestion: Why J2EE s utablfr he evelpmendiribute multi-iered enerprise applcatos?Aswer: he JEEplafo coniss of ult-ie stributed applicatio mde applicatin alos th developrto dsign ad mplemettebunes liinocopnent aording o usness reqireet.JEarhtectur aow he development f muli-ird apliatons andtveloped aplicatios can enstalled on ieentmachnes dpendinon the tir in the multi-red J2EE evironment . The E aplicio part are：a） Cient-tier ompoents ruon the clie achine. b) Web-tier components run n thJ2EEserv. c) Buiness-iermnns run o th E server and th d)Enrre nformain sye (EIS)-ti oftware rsone ES servers Questio:Why o understand a container? Anwer: omal,th-lient ultierepplations arehar owe beaus they ivolv man lnes ofintrctecod tohndle transacton and statmaagement, utthradig, eource poling，ndoth omplexow-lvel details. Thecopoen-based andlatform-indeendentJ2E rtectre mkesJ2 applicationeas to rieecaususiness loicisoganized intoreusab coponent.Idditin,the JEEsrveides uding servcs in the form ofa ctainefrver omponn ype.Becus you d not hvtodevel thee rics yoslf，you are f concenrae on olvng the businssprolm d (Souce: http：/javasn.co2ee1dos/uoil/doc/eview4.ht )In otcontaies r the inrface tee aconent and he loevelplafm speciic functionatythat suprts th copont. Theapliation ikeWeb,nterrisebean, o apliatonclietmponent ust be ssebed nd deplyed n te cotnerbfoe exeuing uetin:Wha are te servs proidedy caner? nsr: Thsrvic prvied by cntaier ares olow: a)Tranctio manaement fo the bea b) Secuity or theean ) Persitenc of he bea d） Remoeaccess t bean e) Lifeccleanagent of the bea f） Databa-connecionooling g） Instane pooling for theben Qu： What ae tyes f 2EE cients? nswer: J2Eclient aeth ftwartha ccss the servce compnent istale on h J2EE coainr Fllowin arethe J2E lients:a） pplts b) Java-WebSartcients c) Wirees ients )apications本文来源：网络收集与整理,如有侵权，请联系作者删除,谢谢!第9页 共9页第 9 页 共 9 页第 9 页 共 9 页第 9 页 共 9 页第 9 页 共 9 页第 9 页 共 9 页第 9 页 共 9 页第 9 页 共 9 页第 9 页 共 9 页第 9 页 共 9 页第 9 页 共 9 页