Online Access Free 1Z0-898 Exam Questions

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 WHERE clause.
• B.The MEMBER expression can be used only with a subquery.
• C.The EXISTS expression can be used only with a subquery.
• D.The ANY expression can be used only with a subquery.
• E.Subqueries can be used in a FROM clause.

Given:

Which statement is correct?

• A.The method will return TRUE.
• B.The method will return FALSE.
• C.The order instance will be removed from the database.
• D.The method will throw an exception.

Given two entities with many-to-many bidirectional association between them: What set of annotations correctly defines the association?

• A.@manyToMany ()targetEntity = project.class) on the projects field,
  @manyToMany (mappedBy = "projects") on the emps field
• B.@manyToMany (targetEntity = Project.class) on the projects field,
  @manyToMany on the emps field
• C.@manyToMany (mappedBy = emps) on the projects field,
  @manyToMany on the emps field
• D.@manyToMany on the projects field,
  @manyToMany (mappedBy= "projects") on the emps field

The embeddable class ContractInformation is used in an element collection of the Employee entity.
@Entity
Public class Employee {
@Id int empId;
@ElementaryCollection Set <ContractInformation> info;
. . .
}
Assume that the phone class is an entity and that address is an embedded class.
Which two of the code segments below can be used to model the state of ContractInformation? (Choose two)

• A.@OneToOne Address address;
• B.@Embeddable Address address;
• C.@ElementaryCollection <Phone> phones;
• D.@ManyToOne phone phone;
• E.@OneToMany Set <phone> phones;

A named query that sets an exclusive pessimistic on the entities returned by the query by setting the NamedQuery lockMode element to LockModeType.PESSIMISTIC_FORCE_INCREMENT. The application starts transaction and executes the query.
Which of the following statements is correct about the entities returned by the query?

• A.Other concurrent transactions may modify but MAY NOT delete the entity instances.
• B.The current transaction may NOT modify or delete the entity instances.
• C.Only the current transition may modify or delete the entity instances.
• D.Other concurrent transactions may modify or delete the entity instances.