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**** SAMPLE Sun Cert Bus Component Developer Java EE Platform 5, Upgrade 2021 Dumps ****
D. A javax.ejb.NoSuchEntityException is thrown.
Answer: B
QUESTION: 139
Which two capabilities are legal for an enterprise bean? (Choose two.)
A. being a socket client
B. updating a static field
C. starting a separate thread
D. listening on a server socket
E. interrupting all the threads in a thread group
F. using the java.lang.System.currentTimeMillis method
Answer: A, F
QUESTION: 140
A session bean calls the setRollbackOnly method on the EJBContext interface within a
business method with an active transaction. Which two are correct? (Choose two.)
A. The transaction timeout is immediately disabled.
B. The container will ensure that the transaction will never commit.
C. The bean must have started the current transaction for this to be legal.
D. The bean must have bean-managed transaction demarcation for this to be legal.
E. The bean must have container-managed transaction demarcation for this to be legal.
Answer: B, E
QUESTION: 141
A User entity is in a one-to-many relationship with a Book entity. Assume that a
developer has a function fetchBook(String title) that fetches a Book entity with the given
title title. Also assume that the developer has an entity manager em. Which query can be
used to return the user that holds the book titled “Java”?
A. em.createQuery(“SELECT u FROM User u where :great IN
u.books.title”).setParameter(“great”,”Java”)
B. em.createQuery(“SELECT u FROM User u where :great IN
u.books”).setParameter(“great”,fetchBook(“Java”))
C. em.createQuery(“SELECT u FROM User u where :great MEMBER OF
u.books.title”).setParameter(“great”,”Java”) 58
D. em.createQuery(“SELECT u FROM User u where :great MEMBER OF
u.books”).setParameter(“great”,fetchBook(“Java”))
Answer: D
QUESTION: 142
Given the following code snippet of an EJB 3.0 entity class:
10. @Entity
11. @Table(name=”ORDERS”)
12. public class Order { …. }
A developer wants to change the name of the database table for the Order entity from
ORDERS to
CUSTOM, without changing the Java source code file.
Which option can the developer use?
A. Override the name using the table subelement within the persistence unit’s
persistence.xml file.
B. This is NOT possible in a portable EJB 3.0 application. The only way to change the
table name is to change the Java source code file.
C. Add a custommapping.xml file to the persistence unit, override the name using the
table subelement, and declare custommapping.xml in the mapping-file element in
orm.xml.
D. Add a custommapping.xml file to the persistence unit, override the name using the
table subelement, and declare custommapping.xml in the mapping-file element in
persistence.xml.
Answer: D
QUESTION: 143
The bean class of an EJB Web service endpoint has one method annotated with
@WebMethod. Which two types can be legally returned from that method? (Choose
two.)
A. java.util.Date
B. javax.ejb.Timer
C. an array of java.lang.String
D. an EJB 3.0 local business interface reference
E. an EJB 3.0 remote business interface reference
Answer: A, C
59
QUESTION: 144
Which component can use a container-managed entity manager with an extended
persistence context?
A. any EJB component
B. only stateful session beans
C. only stateless session beans
D. session beans and web components
Answer: B
QUESTION: 145
Which statement is true about the Timer service in an EJB 3.0 stateless session bean?
A. The timeout callback method contains the business logic that handles the timeout
event.
B. The timeout callback method must be declared as a business method in business
interfaces.
C. The timeout callback method can throw application exceptions to report business logic
failures.
D. A bean class can implement multiple timeout callback methods, each associated with a
different timer.
Answer: A
QUESTION: 146
Consider a deep inheritance hierarchy consisting of Java Persistence entity classes, non-
entities, and mapped superclasses. Which statement is correct, assuming NO mapping
descriptor is present?
A. An entity class must NOT inherit from a non-entity class.
B. An entity class must NOT be extended by a non-entity class.
C. Only the root class in an inheritance hierarchy can be annotated wtith
@MappedSuperclass.
D. The primary key must either be defined in the topmost entity class of the inheritance
hierarchy or it can be defined in a superclass if this class is annotated as
@MappedSuperclass.
Answer: D
60
QUESTION: 147
A developer is creating a long-running Java Persistence reporting application that accesses
a set of related entities. The application is NOT expected to add, change, or remove
records in the database but the data can be changed by another application running on the
same database. Which option will guarantee that the report does NOT contain stale data?
A. Call the EntityManager flush API before preparing the report.
B. Call the EntityManager createQuery API before preparing the report.
C. Call the EntityManager clear API before accessing the fields or properties of the
entities used in the report.
D. Call the EntityManager refresh on each parent entity that is added to the report, and
specify cascade=REFRESH on all corresponding relationships.
Answer: D
QUESTION: 148
Given the following statements about an EJB deployment descriptor for which the
metadata-complete attribute is not specified:
I. The EJB deployment descriptor can provide additional metadata to bean class
annotations. II. The EJB deployment descriptor can partially override bean class
annotations. III. The EJB deployment descriptor can entirely override bean class
annotations.
Which is true?
A. Only statement I is correct.
B. Only statement II is correct.
C. Only statement III is correct.
D. Both statements I and II are correct.
E. Both statements I and III are correct.
Answer: D
QUESTION: 149
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.Serializable {
12. int a;
13. }
Method foo is implemented within the FooBean class as:
11. public void foo(MyData data) {
12. data.a = 2;
61
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 MyData();
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. either 1 or 2
Answer: B
QUESTION: 150
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 foo() { try {
InitialContext ic = new InitialContext();
Object obj = ic.lookup(“ejb/oldBar”); OldBarHome oldBarHome =
(OldBarHome) PortableRemoteObject.narrow(obj, OldBarHome.class);
OldBar oldBar = oldBarHome.create();
C. @EJB private OldBarHome oldBarHome;
public void foo() {
try {
OldBar oldBar = oldBarHome.create();
D. public void foo() {
try {
InitialContext ic = new InitialContext(); OldBarHome oldBarHome =
(OldBarHome) ic.lookup(“ejb/oldBar”); OldBar oldBar = oldBarHome.create();
Answer: C 62
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