Which two solutions are correct?
A developer needs to include a set of managed classes in a persistence unit. Which two solutions are correct? (Choose two.) A. Place the class files in the orm.xml file. B. Place the class files in the root of the…
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Which of the following is true?
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…
Which statement is true?
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…
Which of the following statements is guaranteed to accomplish this?
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.refresh on the entity. B. Add a cacheable (false) annotation on the…
Which two statements are correct?
An application has three entities: the mapped superclass person class entity, and the parent and child entities, which are subclasses of person. The application has created four entity Instances: Caching has been enabled in the persistence unit, the persistence provider…
Which entities are cached when using a persistence provider that supports caching?
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…
Which two of the following statements are correct?
A user entity is retrieved in a query and stored in an instance variable user. The user entity has a single valued name property that uses the mapping defaults, and a photo property, which is lazily loaded. The application then…
Which statement is true?
Persistence application locks entity x with a LockModeType. PESSIMISTIC_READ lock type, which statement is true? A. This operation will force serialization among transactions attempting to read the entity data. B. This operation will result in a TransactionRolledbackException if the lock…
Which circumstance can this happen?
A session bean business method invokes UserTransaction.setRollbackonly and receives an IllegalStateException. Under which circumstance can this happen? A. The bean is using bean-managed transactions regardless of whether there is an active transaction. B. There is no circumstance that would cause…
Which two are valid queries that return this information?
A user entity is in a one-to-many relationship with a Book entity. In other words, a developer reach the collection of books that a user instance myUser has by using the path expression-"myuser -books". A developer wants to write a…