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. The persistence provider will ensure that the…
An application has two entities, parson and Address. The application calls the DeletePersonsByStatus named query. Which of the following is true? A. The person entities are removed, but NOT their related address entities. B. The person entities, and all their…
The developer wants to write a portable criteria query that will order the orders made by customer James Brown according to increasing quantity. Which one of the below queries correctly accomplishes that task? A. CriteriaBuilder cb= . . .CriteriaQuery<order> cq…
The developer wants to write a criteria query that will return the number of orders made by customer of each county. Assume that customer is an entity with a unidirectional one-to-many relationship to the Order entity and that Address is…
Which one of the following queries selects the customer whose order has the highest total price? A. CriteriaBuilder cb = …Criteria Query <Customer> cq = cb.create Query (Customer.class);Root<Customer> c = cq.from (Customer.class);Join<Customer, Order> o = B. join(Customer__.orders);cq.select(c).distinct(true);Subquery<Double> sq = cq.subquery(Double.class);Root<Order>…
If a Persistence application locks entity x with a pessimistic lock, which statement is true? A. The Persistent provider will lock the database row(s) that correspond to all persistent fields of properties of an instance, including element collections. B. Only…
An application that uses pessimistic locking calls an updateData method that results in a LockTimeoutException being thrown. What three statements are correct? (Choose three) A. The current transaction continues. B. The current statement continues. C. The current transaction is rolled…
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…
A developer wrote an entity class with the following method: Private static Logger logger = Logger.getLogger ("myLogger"); @PrePersist @PreUpdate Public void doA () { Logger.info ("A"); } @PostPersist @PostUpdate Public void doB () { logger.info ("B"); } What will the…
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