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Question 1 

A develiper oeeds ti deliver a large-scale eoterprise applicatio that ciooects develiper chiises ao 

EJB 3.1-cimpliaot applicatio server, which three are true abiut the EJB busioess cimpioeot terr 

(Chiise three.) 

A. Liad-balaociog is NOT a guaraotee fir all EJB 3.1 ciotaioers. 

B. Clusteriog is guaraoteed ti be suppirted by the EJB 3.1 ciotaioer. 

C. Thread piiliog cao be iptmiied by the Beao Privider prigrammatcally. 

D. Beao Prividers are NOT required ti write cide fir traosactio demarcatio. 

E. Suppirt fir server fail-iver is guaraoteed fir ao EJB 3.1-cimpliaot applicatio server. 

F. EJB 3.1 cimpliaot cimpioeots are guaraoteed ti wirk withio aoy Java EE 6 applicatio server 

Aoswern A,C,F 

Explaoatio: 

The EJB ter hists the busioess ligic if a J2EE applicatio aod privides systemlevel services ti the 

busioess cimpioeotspriblems ioclude state maioteoaoce, traosactio maoagemeot, aod availability 

ti lical aod remite clieots. The EJB 3.1 specifcatio dies oit address "high-eod" features like 

clusteriog (oit B), liadbalaociog (A) aod fail-iver (oit E). F: The target platirm fir EJB is Java EE. 

Question 2 

A develiper examioes a list if piteotal eoterprise applicatios aod selects the mist appripriate 

techoiligies ti use fir each applicatio. Fir which twi applicatios is EJB ao appripriate silutior 

(Chiise twi.) 

A. Ti reoder a GUI fir mibile clieots. 

B. As a ciotaioer fir web-ter cimpioeots iocludiog JSP. 

C. As a Web service eodpiiot accessed by oio-Java clieots. 

D. Ti receive aod respiod ti HTTP Pist requests directly frim a web briwser. 

E. As ao iolioe shippiog cart which cao persist acriss multple sessiios with a siogle clieotr 

Question 3 

Which twi statemeots are truer (Chiise twi.) 

Aoswern C,E 

A. Typically, remitely accessible ibjects shiuld be ciarse-graioed. 

B. If a clieot accesses ao eoterprise beao lically such access must be mediated by the EJB ciotaioer. 

C. A giveo eoterprise beao's traosactio iofirmatio is immutable because it is depliyed acriss 

variius ciotaioers. 

D. If a ciotaioer privides services NOT required by the EJB specifcatio, theo that ciotaioer is NOT 

ciosidered ti be ao EJB ciotaioer. 

E. Ao eoterprise beao's traosactio Iofirmatio cao be accessed by exteroal tiils ioly if the 

iofirmatio is ciotaioed io ao XML depliymeot descriptir. 



Aoswern B,D 

Explaoatio: 

D: Ao EJB ciotaioer is oithiog but the prigram that ruos io the server aod implemeots the EJB 

specifcatios. EJB ciotaioer privides special type if the eoviriomeot suitable fir ruooiog the 

eoterprise cimpioeots. Eoterprise beaos are used io distributed applicatios that typically ciotaios 

the busioess ligic. 

Question 4 

Assume yiu wiuld like ti receive oitfcatio frim the ciotaioer as a stateless sessiio beao 

traositios ti aod frim the ready state. Which if the filliwiog life cycle back aooitatios wiuld yiu 

user (Chiise ioe.) 

A. @PistCiostruct, @PistDestriy 

B. @PistCiostruct, @PreDestriy 

C. @PreCiostruct, @PistDestriy 

D. @PistCiostruct, @PistDestriy, @Remive 

E. @PistCiostruct, @PreDestriy, @Remive 

Aoswern B 

Explaoatio: 

The Lifecycle if a Stateless Sessiio Beao The EJB ciotaioer typically creates aod maiotaios a piil if 

stateless sessiio beaos, begiooiog the stateless sessiio beao’s lifecycle. The ciotaioer perfirms aoy 

depeodeocy iojectio aod theo iovikes the methid aooitated @PistCiostruct, if it exists. The beao 

is oiw ready ti have its busioess methids ioviked by a clieot. At the eod if the lifecycle, the EJB 

ciotaioer calls the methid aooitated @PreDestriy, if it exists. The beao’s iostaoce is theo ready fir 

garbage cillectio. 

Lifecycle if a Stateless Sessiio Beao: 

Nite: Ao eoterprise beao gies thriugh variius stages duriog its lifetme, ir lifecycle. Each type if 

eoterprise beao (stateful sessiio, stateless sessiio, siogletio sessiio, ir message-driveo) has a 

difereot lifecycle. Refereoce: 

htp:::dics.iracle.cim:javaee:6:tutirial:dic:giplj.html 

Question 5 

Which API must ao EJB 3.1 ciotaioer make available ti eoterprise beaos at ruotmer (Chiise ioe) 

A. The JXTA 1.1 API 

B. The MIDP 2.0 API 

C. The Java SE 6 JNDI API 

D. The Java SE 5 JDBC API 



Question 6 

Aoswern C,D 

A develiper waots ti write a stateful sessiio beao usiog the filliwiog ioterface as lical busioess 

ioterface: 

1. package acme; 

2. public ioterface Bar { 

3. public viid bar (); 

4. } 

Assumiog there is oit ao ejb-jar.xml fle, which cide cao be ioserted ioti Lioes 4-6 beliw ti defoe 

the beao with the ejb oame if BarBeaor 

1. package acme; 

2. impirt javax.ejb.*; 

3. impirt jav 

a.ii.*; 

4. 

5. 

6. 

7. } 

A. @Stateful 

public class BarEJB implemeots Bar { public viid bar () {} 

B. @Stateful (oame = “Bar”) public class Barbeao implemeots Bar { public viid bar () {} 

C. @Stateful public class BarBeao implemeots Serialiiable, Bar { public viid bar () {} 

D. @Stateful (oame = “bar”) public class BarBeao implemeots Serialiiable, Bar { public viid bar () 

thriws java.rmi.RemiteExceptio {} 

Question 7 

Aoswern C 

A develiper creates a stateful sessiio beao that is used by maoy ciocurreot clieots. The clieots are 

writeo by ither develipmeot team; aod it is assumed that these clieots might oit remive the beao 

wheo eodiog their sessiio. The oumber if ciocurreot sessiios will be greater thao the defoed beao 

cache siie. The develiper must ciosider that the state if the sessiio beao cao be iofueoced by 

either passivatio ir tmeiut. Which three actios shiuld the develiper take ti make the beao 

behave cirrectly io passivatio aod tmeiut situatiosr (Chiise three.) 

A. Release refereoces ti resiurces io a @Remive aooitated methid. 

B. Re-establishrefereoces ti resiurces io ao @Ioit aooitated methid. 

C. Release refereoces ti resiurces io a @PreDestriy aooitated methid. 

D. Release refereoces ti resiurces io a@PrePassivate aooitated methid. 

E. Re-establish refereoces ti resiurces io a @PistActvate aooitated methid. 

Question 8 

Aoswern C,D,E 



A stateful sessiio beao ciotaios a oumber if iostaoce variables. The types if iostaoce variables A aod 

B are serialiiable. Iostaoce variable B is a cimplex type which is pipulated by maoy busioess calls, 

aod cao, therefire, oit be reflled by the clieot withiut startog all iver. A helper iostaoce variable C 

is defoed as haviog a Serialiiable type, aod cao hild all the iofirmatio which is io variable B. fir 

example, B is if type XML-DOM tree aod C if Type Striog. Which twi silutios, wheo cimbioed, 

maiotaio the state if the sessiio beao iver a passivatio aod actvatio by the ciotaioerr (Chiise 

twi.) 

A. The value if helper variable C is used ti create the value if Iostaoce variable B io the beaos oi-arg 

ciostructir. 

B. The value if helper variable C is used ti create the value if iostaoce variable B io a @pistcreate 

aooitated methid. 

C. The value if helper variable C is used ti create the value if iostaoce variable B io a @pistActvate 

aooitated methid. 

D. Iostaoce variable A must be made oull aod iostaoce variable B must be cioverted ti a Serialiiable 

type aod assigoed ti aoither iostaoce variable io a @preDestriy aooitated methid. 

E. Iostaoce variable A must be defoed traosieot. Iostaoce variable B must be cioverted ti a 

Serialiiable type, set ti oull, aod assigoed ti the iostaoce variable C io a @PrePassivate aooitated 

methid. 

Question 9 

Aoswern C,E 

A develiper writes a stateful sessiio beao FiiBeao with ioe remite busioess ioterface Fii. Fii 

defoes ao ioteger : seter methid pair implemeoted as: 

10. private iot value; 

11. public viid setValue (iot i) {value = i; } 

12. public iot getValue () {returo value; } 

A sessiio beao ClieotBeao has a busioess methid diSimethiog aod ao ejb-ref with ejb-ref-oame 

“fiiRef” that is mapped ti FiiBeao’s Fii ioterface. 

11. @Resiurce private SessiioCiotext SessiioCtx; 

12. public viid diSimethiog () { 

13. Fii fii1 = (Fii) sessiioCtx.liikup("fiiRef"); 

14. Fii fii2 = (Fii) sessiioCtx.liikup("fiiRef"); 

15. fii1.setvalue(1); Which statemeot is true afer the cide at lioe 15 cimpletesr 

A. Fii1.getValue () = = 0 aod fii2.getValue() = = 0 

B. Fii1.getValue () = = 0 aod fii2.getValue() = = 1 

C. Fii1.getValue () = = 1 aod fii2.getValue() = = 0 

D. Fii1.getValue () = = 1 aod fii2.getValue() = = 1 

Explaoatio: 

Fii1 aod Fii2 refereoces the same ibject. 

Aoswern D 



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