Is this exam completely free?

ExamCademy offers a free preview for every exam, covering around 20% of the total questions. Full access to all questions is available for free by signing up for an account. Optional supporters unlock AstroTutor (AI tutor) and advanced study modes.

Can I practice IT certification exams from Microsoft, AWS, or CompTIA?

Yes! ExamCademy supports a wide range of IT certification exams including Microsoft Azure, AWS Cloud Practitioner, and CompTIA A+ and Security+.

How accurate are the mock exams?

Our practice questions are community-created and moderator-reviewed to align with realistic exam objectives, style, and difficulty.

1Z0-898 by Oracle - Page 1 | ExamCademy

Mode Selection

Sort:

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

That's the end of the Preview

Create a free account to unlock all questions for this exam.

Log In / Sign Up

Page 1 of 3 • Questions 1-25 of 60

1 2 3

→

Know a question that should be here? Contribute to this exam

Entity lifecycle callback methods may be defined in which three classes? (Choose three)

A Embedded classes
B Entity classes
C Abstract classes
D Entity listener classes
E Mapped superclasses
F Concrete non-entity superclasses

A developer has created a deep entity class hierarchy with many polymorphic relationships between entitles. Which inheritance strategy, as defined by the inheritanceType enumerated type, will be most performed in this scenario?

A Single table-per-class-hierarchy (InheritanceType.SINGLE_TABLE)
B Joined-subclass (inheritanceType. JOINED)
C Table-per-concrete-class (inheritanceType.TABLE_PER_CLASS)
D Polymorphic join table (inheritanceType. POLYMORPHIC_JOIN_TABLE)

A developer is creating an entity which is mapped to a table that has a primary key constraint defined on two character columns and would like to use mapping defaults as much as possible to simplify the code.
Which two mapping options can be chosen? (Choose two.)

A Use an @id property that constructs a private field as a concatenation of two columns.
B Use a separate class to map those two columns and use an @idclass annotation to denote I primary key field or property in the entity.
C Use a separate @Embeddable class to map those two columns and use an @EmbeddedId annotation to denote a single primary key field or property in the entity.
D Use a separate @Embeddable class to map those two column and add two fields or properties the entity, each marked as @id, that correspond to the fields or properties in the embeddable class.
E Use a separate class to map those two columns. Specify that class using @Idclass annotation on the entity class. Add two fields or properties to the entity,

A developer wants to model the grades for a student as a Map<course, integer>. Assume that Student and Course are entitles, and that grades are modeled by integers.
Which of the following two statements are correct? (Choose two)

A The developer can model the grades as an element collection in the Student entity.
B The developer can model the grades as a oneToMany relationship in the Student entity.
C The mapping for the key of the map can be specified by the @MapKeycolumn annotation.
D The mapping for the value of the map can be specified by the @Column annotation.

Consider a persistence application with the following orm.xml:

Question Image

What will be the effect of the above orm.xml?

A The access type for only those entities that have not explicitly specified @Access will be defaulted to field.
B The access type for all entities in the persistence unit will be changed to FIELD.
C The access type for all entities specified in this orm.xml will be changed to FIELD.
D The access type for only those entities defined in this orm.xml for which access is not specified will be defaulted to FIELD.

A developer has created an application managed entity manager.
Which statement is correct?

A A new persistence context begins when the entity manager is created.
B A new persistence context begins when a new JTA transaction begins.
C A new persistence context begins when the entity manager is invoked in the context o\ transaction.
D A new persistence context begins when the entity manager is invoked in the context of a resource-local transaction.

If an application uses an extended persistence context, which of the following is true?

A The persistence context exists until all transactions invoked by the EntityManager complete.
B The persistence context exists until all transactions invoked by the EntityManagar complete and the EntityManager.clear () method is invoked.
C The persistence context exists until the EntityManager instance is closed.
D The persistence context exists until the EntityManagerFactory instance is closed.

An application that uses container-managed transaction demarcation creates a query within an active transaction and receives a QueryTimeoutException. Which of those scenarios describes what happens to the active transaction?

A The statement and the transaction continue.
B The query is recreated within the current transaction.
C The statement and the transaction are marked for rollback.
D The statement is rolled back, but the transaction continues.

An application wants to utilize side effects of cascading entity manager operations to related entities.
Which statement is correct?

A The persist operation is always cascaded to related entitles for one-to one and one-to-many relationships.
B To minimize the effect of the remove operation applied to an entity participating in a many-to-many relationship the remove operation should he cascade to entities on both sides of the relationship.
C The persist operation applied to a new entity x is cascaded to entities referenced by x if the relationship from x to these other entities is annotated with the cascade=PERSIST or cascade=ALL annotation element value.
D The remove operation applied to a removed entity x is cascaded to entities referenced by x of the relationship from x to these other entities is annotated with