1z0-900 Exam PDF - Valid and Updated 1z0-900 Dumps | Dumps4Download

Demo Questions:

QUESTION: 1

A Persistence application locks entity x with a LockModeType.PESSIMISTIC_READ
lock type. Which statement is true?

A. LockModeType.PESSIMISTIC_READ is the synonym of LockModeType.READ
B. This operation will force serialization among transactions attempting to read the
entity data.
C. This operation will result in a TransactionRolledbackException if the lock cannot be
obtained.
D. If the application updates the entity later, and the changes are flushed to the database,
the lock will be converted to an exclusive look.

Answer: B

Reference:
https://docs.oracle.com/javaee/7/api/javax/persistence/LockModeType.html

QUESTION: 2

Which statement is true about Java methods that are exposed as Web Service operations
by using JAX-WS API?

A. The @WebResult annotation must exist.
B. Method parameters and return types must be JAXB compatible.
C. Method parameters must be declared by using @WebParam.
D. The @WebMethod annotation must exist.

Answer: D 

QUESTION: 3

Given the JPQL code fragment:
Select pub.title, pub.author, pub.pages FROM Publisher pub
Which two clauses do you add to this JPQL query to retrieve only those books with
between 500 and 750 total pages? (Choose two.)

A. WHERE MIN(pages) >= 500 AND MAX(pages) <= 750
B. WHERE pub.pages <= 500 OR pub.pages >= 750
C. WHERE pub.pages BETWEEN 500 AND 750
D. WHERE pub.pages <= 500 AND pub.pages >=750

Answer: A, B 

QUESTION: 4

You are building the User Preferences page of an application. A user can change values,
such as his or her name, password, address, company, and so on. These values are sent
to a CDI backing bean via AJAX when the user tabs out of each field. However, the
values must be retained in the CDI bean and stored in the database only when the user
clicks the Save button. Which two scopes will allow your CDI bean to retain its state
while the user is interacting with the User Preferences page? (Choose two.)

A. Dependent
B. View
C. Session
D. Request
E. Application

Answer: C, D 

Related Links: https://www.dumps4download.com/1z0-900-dumps.html