Given two entities with a many-to-many bidirectional association between them:
11.
@Entity public class Employee!
12.
Collection projects;
13.
// more code here
14.}
and
11.©Entity public class Project!
12.
Set
13.
// more code here
14.}
What set of annotations correctly defines the association?
A. @ManyToMany on the projects field, @ManyToMany(mappedBy="projects") on the emps field
B. @ManyToMany(mappedBy="emps") on the projects field, @ManyToMany on the emps field
C. @ManyToMany(targetEntity=Project.class) on the projects field, @ManyToMany(mappedBy="projects") on the emps field
D. @ManyToMany(targetEntity=Project.class) on the projects field, @ManyToMany on the emps field
A developer wants to perform programmatic access control inside EJB 3.0 session beans. This is needed because some permissions can be determined only at application runtime. Which method achieves this goal?
A. javax.ejb.EJBContext.getRollbackOnlyO
B. java.lang.SecurityManager.checkAccess(Thread t)
C. javax. interceptor. InvocationContext. getTargetO
D. javax. ejb. SessionContext.isCallerlnRole(String roleName)
E. javax. servlet. http. HttpServletRequest. getUserPrincipalQ
A session bean's business method throws an exception during execution. Which two are responsibilities of the Bean Provider when throwing the exception? (Choose two.)
A. For application exceptions, ensure that if the current transaction commits there will be no loss of data integrity.
B. For application exceptions, ensurethatthe current transaction will commit.
C. For system errors, when the client is remote, throw a java.rmi.RemoteException that wraps the original exception.
D. For checked exceptions from which the bean cannot recover, throw an EJBException that wraps the original exception.
A developer creates the following session bean:
10.
©Stateless
11.
@RolesAllowed("SECRET")
12.
public class MyBean implements Mylnterface
13.
public void methodAOJ}
14.
@PermitAII
15.
public void methodB0 {}
16.
@DenyAII
17.
public void methodC0 {}
18.}
No deployment descriptor is supplied. Which two statements are true? (Choose two.)
A. A user in the role "SECRET" will be able to access all of the methods.
B. A user in the role "FOO" will be able to access methodA and methodB.
C. A user without any role will be able to access methodB but NOT methodA.
D. A user in the role "SECRET" will be able to access methodA and methodB.
E. A user in the role "SYSADM" will be able to access methodA, methodB, and methodC.
Given a stateless session bean with container-managed transaction demarcation, from which two methods can a developer access another enterprise bean? (Choose two.)
A. beanconstructor
B. Timeout callback method
C. PreDestroy lifecycle callback method
D. PostConstruct lifecycle callback method
E. businessmethod fromthebusiness interface
Which statement about entity manager is true?
A. A container-managed entity manager must be a JTA entity manager.
B. An entity manager injected into session beans can use either JTA or resource-local transaction control.
C. An entity manager created by calling the EntityManagerFactory.createEntityManager method always uses JTA transaction control.
D. An entity manager obtained through resource injection in a stateful session bean can use a resource-local EntityTransaction for transaction control
Which two statements about the EJBContext. isCallerlnRole method are correct? (Choose two.)
A. Message-drivenbeans must NOT call the isCallerlnRole method.
B. The isCallerlnRole method may be called in a session bean constructor.
C. The isCallerlnRole method can be called in any business method of a stateless or a stateful session bean.
D. The isCallerlnRole method can be called in the PostConstruct and PreDestroy lifecycle callback methods of a stateless session bean.
According to the Java Persistence API, a managed entity instance X becomes removed by invoking the remove method on it or when it is a target of a cascaded remove operation. Which statement is true?
A. After an entity has been removed its state will be restored to the Java defaults.
B. If a detached entity Y references Xthe HlegalStateException will be thrown.
C. If X is a new entity the remove operation is cascaded to entities referenced by X.
D. A removed entity X will be guaranteed to be removed from the database when the remove method returns.
Given the following entity class:
11.
@Entity public class Customer)
12.
@ld private int id;
13.
private transient String name;
14.
private Java. math. BigDecimal grossAmmount; 15.} Which mapping annotation can be added to the fields of this entity?
A. @Columntothe name field
B. @Embeddedldto theid field
C. @Basictothe grossAmmountfield
D. @JoinColumnstothe grossAmmount field
A developer writes a stateless session bean FooBean with one remote business interface FooRemote containing one business method foo. Method foo takes a single parameter of application-defined type MyData.
11.
public class MyData implements Java. io.Serializablej
12.
int a;
13.}
Method foo is implemented within the FooBean class as:
11.
public void foo(MyData data) {
12.
data.a = 2;
13.}
Another session bean within the same application has a reference to FooRemote in variable fooRef and calls method foo with the following code:
11.
MyData data = new MyDatafJ;
12.
data.a = 1;
13.
fooRef.foo(data);
14.
System, out. println(data. a);
What is the value of data, a when control reaches Line 14 of the client ?
A. 0
B. 1
C. 2
D. either1or 2
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