Online Access Free 1Z0-898 Exam Questions

An application uses optimistic locking by defining version attributes in its entity classes. The application performs a bulk update of the entities using a JPQL query.
Which of the following is correct?

• A.An OptimisticLockException will be thrown by the persistence provider.
• B.The persistence provider will ensure that the version value in each table is updated.
• C.The persistence provider will create a new transaction for the bulk update.
• D.The value of the Version attributes of the updated entitles should be also be explicitly updated by the query.

A JavaEE application is packaged as follows.

Which of the following is true for a portable JavaEE application?

• A."MyPu" defined under each module is visible to only the defining module. There is no way other modules can access it.
• B.This is an invalid application. A JavaEE application cannot have more than one persistent with same name.
• C.Code in the ejb1.jar can access "MyPU" defined under war1.war using "war1#myPU"

Given the following entity classes:
@Entity
@cacheable (true)
Public class A { . . . } @Entity
@cacheable (false)
Public class B { . . .}
@Entity
Public class C { . . . }
If the shared-cache-mode element of persistence.xml is set to ENABLE _SERVICE, which entities are cached when using a persistence provider that supports caching?

• A.A, B, and C
• B.A and C
• C.A and B
• D.A only

A developer wants to ensure that an entity's data is up-to-date with regard to the database. Which of the following statements is guaranteed to accomplish this?

• A.Call EntityManager.find on the entity.
• B.Call EntityManager.refresh on the entity.
• C.Add acacheable (false) annotation on the entity class.
• D.Use a named query to retrieve the entity.

A stateless session bean's business method invokes EJBContext.setRollBackOnly and receives an IllegalStateException.
Under which of these conditions could this be possible?

• A.This Is NOT possible; a stateless session bean cannot invoke EJBContext.SetRollBackOnly.
• B.The business method is marked with the NONSUPPORTED transaction attribute.
• C.The business method is marked with the MANDATORY transaction attribute.
• D.The bean has no metadata (in annotations 01 deployment descriptor) which specifies the transaction attribute for the method.