Online Access Free 1Z0-898 Exam Questions

Consider the following web application:

Here MyEntity1.class and MyEntity2.class are annotated with @Entity and MyEmbeddable1-class and MyEmbeddable2-class are annotated with @Embeddable. MyPU is container managed. Which of the following represents set of classes considered managed by MyPU?

• A.MyEntity1, MyEmbeddable1, and MyEntity2
• B.MyEntity1 and MyEntity2
• C.MyEntity1, MyEmbeddable1, MyEntity2, and MyEmbeddable2
• D.MyEntity1, and MyEmbeddable1

An application creates a TypedQuery object to perform a query, and sets the query object's flush mode by calling setFlushMode (FlushModeType.commit). The query is executed within a transaction.
Which of the following is true?

• A.Updates to the entities that can affect the outcome of the query cannot be flushed to the database until the transaction commits.
• B.Updates to the database tables may occur anytime during the transaction associated with the query.
• C.Changes to the entities in this transaction cannot be flushed to the database until the transaction commits.
• D.setFlushMode cannot be called on a TypedQuery object.

A developer wants to create a Java Persistence query that will include a subquery.
Which three are true? (Choose three.)

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

An application has two entities, Department and Employee, and there is a one-to-many relationship between them. The application has the following query:
SELECT d
FROM Department d LEFT JOIN FETCH d. employees
WHERE d.name = : name
After receiving the results of the query, the application accesses the returned department's Employee entities stored in the Department.employees collection-valued attribute.
All caching has been turned off in the application.
Which statement is true?

• A.The database will be accessed once during the query execution phase, once when the Department. Employees collection-valued attribute is used, and once for each employee entity in the Department.employees.
• B.The database will be accessed once during the query execution phase, and once when the department.employees collection-valued attribute is used.
• C.The database will be accessed once during the query execution phase, and once for each Employee entity in Department - employees.
• D.The database will be accessed once during the query execution phase ONLY.

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

• A.@manyToMany (mappedBy = emps) on the projects field,
  @manyToMany on the emps field
• B.@manyToMany on the projects field,
  @manyToMany (mappedBy= "projects") 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