Which statement about the JoinTable annotation is true?
A. It must be applied to a unidirectional many-to-one association.
B. It can be applied to the owning side of a many-to-many association.
C. It must be applied to the owning side of a unidirectional one-to-many association.
D. If the name attribute is not specified it is derived from the names of the primary keys of the two entities involved in the association.
A developer has obtained a container-managed entity manager with transaction scoped persistence context. Assume there is no persistence context associated with the entity manager. When does a new persistence context begins?
A. whenaJTA transaction begins
B. when the entity manager is created
C. whenthe entitymanageris invoked in the scope of an active JTA transaction
D. when theentitymanager is created inthe scopeof an active resource local transaction
The Java Persistence entity Lineltem defines a composite primary key that is defined by the two columns ORDERID and LINEITEMID in the database. Which two are true? (Choose two.)
A. Lineltem must define a primary key class to represent the composite primary key.
B. The composite primary key is mapped as two fields in Lineltem. No extra primary key class is necessary.
C. The combination of ©Embedded and @Embeddable annotations can be used to denote the composite primary key.
D. The semantics of the equals and hashCode methods of the primary key class must be consistent with the database equality.
Which statement is correct about the Java Persistence API support for the SQL queries?
A. SQL queries are NOT allowed to use parameters.
B. The result of an SQL query is not limited to entities.
C. Only SELECT SQL queries are required to be supported.
D. SQL queries are expected to be portable across databases.
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".
A Java Persistence application uses entities mapped to tables from two datasources in the same transaction. What statement is correct?
A. This is NOT possible.
B. The entities mustbepackaged into two persistence units.
C. The entitiescanbe packaged intoa singlepersistence unit
D. Theentities must be packaged usingtwo differentpersistence.xml files.
The Java Persistence API defines the Query interface. Which two statements about the Query.executeUpdate method are true? (Choose two.)
A. Itmust always be executed within a transaction.
B. It throws a PersistenceException if no entities were updated.
C. It throws an HlegalStateException if called on a Query instance created with a Java Persistence SELECT query.
D. All managed entity objects corresponding to database rows affected by the update will have their state changed to correspond with the update.
Given:
11.
@PersistenceContext EntityManager em;
12.
public boolean test(Order o) {
13.
boolean b = false;
14.
o = em.merge(o); 15 em.remove(o);
16.
o = em.merge(o);
17.
b = em.contains(o);
18.
return b;
19.}
Which statement is correct?
A. The method will return TRUE.
B. Themethod will return FALSE.
C. Themethodwill throw an exception.
D. TheOrder instance willberemoved from the database.
A developer creates a stateful session bean that is used by many concurrent clients. The clients are written by other development teams and it is assumed that these clients might not remove the bean when ending their session. The number of concurrent sessions will be greater than the defined bean cache size. The developer must consider that the state of the session bean can be influenced by either passivation or timeout. Which three actions should the developer take to make the bean behave correctly in passivation and timeout situations? (Choose three.)
A. Release references to resources ina@Removeannotated method.
B. Re-establish references to resources in an @lnit annotated method.
C. Release references to resources ina@PreDestroy annotated method.
D. Release references to resources in a @PrePassivate annotated method.
E. Re-establish referencestoresources ina (©PostActivate annotatedmethod.
The Java Persistent API defines certain rules for persistent entities. These rules are required by the persistent provider to manage entities at runtime. Which statement is correct, assuming NO mapping descriptor is used?
A. Entitiesmust extenda persistent base class.
B. Entities must implement the interface PersistentEntityto bemanaged bythepersistent provider.
C. Afield withoutatransient modifier mustbeannotated as ©Persistent to be stored in the database.
D. A field without a transient modifier must be annotated as ©Transient to NOT be stored in the database.
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