Which statement describes a component definition that is allowed by the EJB 3.0 specification?
A. A stateful session bean that is a Web service endpoint.
B. A stateful session bean that has one remote business interface and is a Web service endpoint.
C. A message-driven bean that has one message listener interface and is a Web service endpoint.
D. A stateless session bean that has three local business interfaces and is a Web service endpoint.
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.createQueryfSELECT u FROM User u where :great IN
B. books.title").setParameter("great","Java")
C. em.createQuery("SELECT u FROM User u where :great IN C. books"). setParameter("great",fetchBook("Java"))
D. em.createQuery("SELECT u FROM User u where :great MEMBER OF E. books.title"). setParameter("great" ."Java")
E. em.createQuery("SELECT u FROM User u where :great MEMBER OF G. books"). setParameter("great",fetchBook("Java"))
A User entity is in a one-to-many relationship with a Book entity. In other words, a developer can reach thecollection of books that a User instancemyUser has by using the path expression"myUser.books". A developer wants to write a Java Persistence query that returns all users that have only two books. Which two are valid queries that return this information? (Choose two.)
A. SELECTu FROM UseruWHERESIZE(u.books) = 2
B. SELECT u FROM UseruWHERE COUNT(u. books) = 2
C. SELECT u FROM User u WHERE(SELECT COUNT(b)FROM u.books b) = 2
D. SELECTuFROMUser uWHERE (SELECT SIZE(b) FROM u.booksb)= 2
FooBean is an EJB 3.0 session bean that can make valid use of UserTransaction. Which is guaranteed to work in an EJB container for FooBean to obtain the UserTransaclion object?
A. Invoke a method on a SessionContext that returns a UserTransaction object.
B. Perform JNDI lookup with name "java:/UserTransaction" on an InitialContext.
C. Perform JNDI lookup with the name "jdbc/UserTransaction" on an InitialContext.
D. Use the @TransactionManagement annotation to inject an instance variable of type UserTransaction in a bean class.
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 test zero 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".
Which two are programming restrictions in the EJB 3.0 specification? (Choose two.)
A. An enterprisebean must NOTattempttoloadanative library.
B. An enterprise bean must NOT declare static fieldsasfinal.
C. An enterprisebeanmust NOTattemptto createa newsecurity manager.
D. An enterprise bean mustNOTpropagate a RuntimeExceptiontothe container.
E. An enterprise bean must NOTattemptto obtain ajavax.naming. InitialC ontext.
A developer wants to create a Java Persistence query that will include a subquery. Which three are true? (Choose three.)
A. Subqueries can be used in a FROM clause.
B. Subqueries can be used in a WHERE clause.
C. The ANY expression can be used only with a subquery.
D. The EXISTS expression can be used only with a subquery.
E. The MEMBER expression can be used only with a subquery.
A developer wants to implement a relationship between Company and Department entity classes. Every department belongs to one company, and one company has several departments. In this application it is essential to quickly determine which company a department belongs to and to also easily access all departments of a given company. Which two declarations provide a solution to these requirements? (Choose two.)
A. In class Department @ManyToOne private Company company;
B. In class Department @OneToMany private Company company;
C. In class Department: @OneToMany(mappedBy="department") private Collection
D. In class Company: @ManyToOne(mappedBy="company") private Collection
A Java Persistence application has been developed for a Java SE environment and the persistence, xml file looks like this:
transaction-type=RESOURCE_LOCAL>
Which two statements are correct about EJB 3.0 stateful session beans and stateless session beans? (Choose two.)
A. Bothcan have multiple remote and local business interfaces.
B. Both can be passivated by the EJB container to preserve resources.
C. Both can choose to implement the javax. ejb.SessionSynchronization interface.
D. Only the stateful session bean class is required to implement java.io.Serializable
E. Both beanclasses can have the field injection of javax. persistence. EntityManager.
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