Printable PDFJava EE 6 Java Persistence API Developer Certified Expert: 1Z0-898
Vendor: Oracle
Certifications: Oracle Java
Exam Name: Java EE 6 Java Persistence API Developer Certified Expert
Exam Code: 1Z0-898
Total Questions: 63 Q&As
Last Updated: Dec 14, 2021
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1Z0-898 Online Practice Questions and Answers
Given the following code:
Public void create () {
try {
doA () {
} catch (PersistenceException e) {}
try (doB) ();
} catch (PersistenceException e) {}
}
Calling method doA will cause an NonUniqueResultException to be thrown. Calling method doB will cause an EntityExistsException to be thrown.
What two options describe what will happen when the create method is called within an application ' uses container managed transactions? (Choose two)
A. Method doB will never be called.
B. The current transaction will continue after doA executes.
C. The current transaction will continue after doB executes.
D. The current transaction will be marked for rollback when doA is called.
E. The current transaction will be marked for rollback when doB is called.
It a Persistence application locks entity x with a pessimistic lock, which statement is true?
A. Persistence provider can defer obtaining the lock until the next synchronization of an entity to the database.
B. A Persistenceprovider will obtain the lock when the entity is refreshed from the database.
C. A Persistence provider is not required to support the LockModeType. PESSIMISTIC_WRITE locking type.
D. If a lock cannot be obtained, the Persistence provider must throw an exception.
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 database tables may occur anytime during the transaction associated with the query.
B. Updates to the entities that can affect the outcome of the query cannot be flushed to the database until the transaction commits.
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.
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