A CMT session bean named MrBean is annotated as follows :
21.
@Stateless(name="MrBean")
22.
@TransactionAttribute0"ransactionAttributeType.NOT_SUPPORTED)
23.
public class MrBean {
24.
public void storeStuffQ {}
25.
There are no transaction annotations at the method level. Given the following snippet of an ejb-jar.xml:
23.
24.
25.
26.
27.
28.
29.
Which statement is correct about the business methods in MrBean?
A. All methods have transactionattributeREQUIRED.
B. All methodshavetransaction attributeMANDATORY.
C. All methodshavetransaction attribute NONSUPPORTED.
D. Methods with name store Stuff have transaction attributeMANDATORYand all other methods have transaction attribute REQUIRED.
E. MethodswithnamestoreStuffhavetransaction attribute MANDATORY andall othermethods have transaction attribute NONSUPPORTED.
F. Methodswithname store Stuff haveatransaction attribute REQUIRED andallother methods have transaction attribute NOT SUPPORTED.
Which four are defined in the EJB specification as a standard EJB role? (Choose four.
A. End Point Provider
B. Persistence Provider
C. NameSpace Provider
D. JSF Interface Provider
E. ApplicationAssembler
F. EJBContainerProvider
G. EnterpriseBeanProvider
The syntax of the ORDER BY clause is defined in the Java Persistence API asorderby_clause ::=ORDER BY orderbyjtem {, orderbyjtem}* Which statement is correct about the use of ORDER BY clauses?
A. Only literals can be specified as an orderbyjtem.
B. Fields or properties of any type can be specified as an orderbyjtem.
C. The ordering must be specified if two or more orderbyjtem methods are provided.
D. If two orderbyjtem methods are provided the left orderbyjtem has the higher precedence.
A developer is writing implementation code for an EJB 3.0 message-driven bean class that processes booking requests. Within the business logic of the onMessage method, a temporary problem can occur. In that case the developer wants to make sure that the booking request is processed again in 30 minutes. Which two can the developer select? (Choose two.)
A. Throwa runtimeexception torollbackthetransaction.
B. Call setRollbackOnly on the MessageDrivenContext interface.
C. Makeuseof the TimerService, and implement the TimedObject interface.
D. Make use of the TimerService,implement areprocess method, and annotate it with @Timeout.
E. Throw an application exception, and addtheretry-after attribute to the deployment descriptor.
Given a set of CMT bean methods with the following transaction attributes: Method M1=SUPPORTS Method M2=REQUIRED Method M3=NOT_SUPPORTED Method M4=REQUIRES_NEW And the following method invocation sequence: Method M1 invokes Method M2 Method M2 invokes Method M3 Method M1 invokes Method M4 If Method M1 is invoked by a method that does NOT have a transaction context, which describes a possible scenario?
A. Method M1notransaction MethodM2new transaction Method M3no transaction MethodM4newtransaction
B. Method M1notransaction Method M2Container throws EJBTransactionRequiredException
C. MethodM1new transaction Method M2runs in same transaction as M1 Method M3Container throws TransactionNotSupportedException
D. Method M1no transaction Method M2new transaction Method M3Container throws TransactionNotSupportedException
OldBarBean is a stateless session bean written to the EJB 2.1 API with remote home interface. OldBarHome and remote component interface OldBar. FooBean is a stateless session bean written to the EJB 3.0 API. OldBarBean and FooBean are the only EJBs packaged in the ejb-jar. The FooBean portion of the ejb-jar. xml also declares an ejb-ref whose ejb-ref-name is ejb/oldBar. The ejb-ref is linked to OldBarBean. There are no other ejb dependencies defined. A business method foo in FooBean needs to access OldBarBean. Which is portable code to achieve this goal?
A. ©Remote private OldBar oldBar;
B. public void fooQ { try { InitialContext ic = new InitialContextO; Object obj = ic.lookup("ejb/oldBar"); OldBarHome OldBarHome = (OldBarHome) PortableRemoteObject.narrow(obj, OldBarHome.class); OldBar oldBar = oldBarHome.createO;
C. @EJB private OldBarHome OldBarHome; public void fooQ { try { OldBar oldBar = oldBarHome.createQ;
D. public void fooQ { try { InitialContext ic = new InitialContextO; OldBarHome OldBarHome = (OldBarHome) ic.lookup("ejb/oldBar"); OldBar oldBar = oldBarHome.createQ;
A developer implemented a Java class called Store. The class is annotated correctly to act as an entity. The developer created a stateless session bean to create, lookup, and remove Store objects. This session bean has a container-
managed entity manager injected into field em and a removeStore method with transaction attribute REQUIRED.
Given the following code :
32.
public void re move St ore (St ore store) {
33.
em.remove(store); 34.}
What is a possible reason that an HlegalArgumentException is thrown at Line 33 when the removeStore method is called by a remote client?
A. Thepassedobject is NOT serializable.
B. Thepassed object is NOT found inthedatabase.
C. The passed object is NOT managed by the entity manager.
D. There is no active transaction to manage the database removal.
A developer is designing a Java Persistence application that is mapped to a set of existing tables. This set includes table EMPLOYEE, DEPARTMENT, and PROJECT. Tables EMPLOYEE and DEPARTMENT do NOT define any foreign key constraints to table PROJECT. Table PROJECT defines foreign key constraints with references to tables EMPLOYEE and DEPARTMENT and an extra column called COST. The table EMPLOYEE is mapped to an entity Employee and the table DEPARTMENT to an entity Department. How can the table PROJECT be mapped so the persistence application can be portable?
A. Such sets of tables cannotbemappedandkeep the application portable.
B. Map thetablePROJECT asasecondary table for either the Employee or Departmententity.
C. Map the table PROJECT to bidirectional many-to-many relationships between the Employeeand Departmentusing a Java. util.Mapas the type ofthefield or property.
D. Mapthe tablePROJECT to an entity Projectwith afield or property cost mappedto thecolumn COST and one-to-many relationshipstothis entity in the Employee and the Department.
A CMT session bean named MrBean contains a method storeStuff which is annotated as follows:
22.
@TransactionAttributeO"ransactionAttributeType.REQUIRES_NEW)
23.
public void storeStuffO {
All other methods of this bean have no transaction annotations. Given the following part of an ejbjar.
xml:
23.
24.
25.
26.
27.
28.
29.
Which statement is correct about the methods in MrBean?
A. Allmethods of MrBean have transaction attribute REQUIRED.
B. All methodsofMrBean have transactionattribute NONSUPPORTED.
C. MethodstoreStuffhastransactionattributeREQUIRES_NEWandthe other methods have transaction attribute REQUIRED.
D. Method storeStuff has transaction attribute NONSUPPORTED and the other methods have transaction attribute REQUIRED.
E. Method storeStuff has transaction attribute REQUIRES NEWandthe other methodshavetransaction attribute NOT SUPPORTTED.
A developer writes an interceptor class called Foolnterceptor containing the following Aroundlnvoke method:
11.
@Aroundlnvoke
12.
public Object intercept(lnvocationContext ctx) {
13.
return "intercepted"; 14.}
Foolnterceptor is applied to a business method in a stateless session bean:
11.
@lnterceptors(Foolnterceptor.class)
12.
public String testzero(int i) {
13.
return (i == 0) ? "zero""not zero";
14.
}
Which describes the result when a client invokes the testzero method with a value of 1?
A. The intercept method is NEVER invoked.
B. The clientreceivesareturnvalueof "zero".
C. The client receivesa returnvalue of "not zero".
D. The client receivesareturn value of "intercepted".
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