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The findAll() method will be called and the employee list will be returned.
The findAll() method will be called and no employees will be returned.
No method will be invoked and no error will be returned.
No method will be invoked and a 404 error will be returned.
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.)
Answer: C, D
A Persistence application locks entity x with a LockModeType.PESSIMISTIC_READ lock type. Which statement is true?
LockModeType.PESSIMISTIC_READ is the synonym of LockModeType.READ
This operation will force serialization among transactions attempting to read the entity data.
This operation will result in a TransactionRolledbackException if the lock cannot be obtained.
If the application updates the entity later, and the changes are flushed to the database, the lock will be converted to an exclusive look.
Which statement is true about Java methods that are exposed as Web Service operations by using JAX-WS API?
The @WebResult annotation must exist.
Method parameters and return types must be JAXB compatible.
Method parameters must be declared by using @WebParam.
The @WebMethod annotation must exist.
Given the code fragment:
What output will be returned when this servlet is called a GET request?
Service() method called.
Service() method called.Get() method called.
An HTTP error
GET() method called.
Give the code fragment:
And the code fragment:
The sendConfirmation() and reserve() methods should be executed in the same transactional context. Which transaction attributes do you ensure this?
Add annotations:@TransactionAttribute (TransactionAttributeType.REQUIRES_NEW) at line 2,@Transactional at line 9 and@TransactionAttribute ((TransactionAttributeType.MANDATORY) at line 12
No additional annotations are required.
Add annotations:@TransactionAttribute (TransactionAttributeType.REQUIRED) at line 2,@Transactional at line 9 and@TransactionAttribute ((TransactionAttributeType.REQUIRES_NEW) at line 12
Add annotations:@TransactionAttribute (TransactionAttributeType.MANDATORY) at line 2,@Transactional at line 9 and@TransactionAttribute ((TransactionAttributeType.REQUIRES_NEW) at line 12
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.)
WHERE MIN(pages) >= 500 AND MAX(pages) <= 750
WHERE pub.pages <= 500 OR pub.pages >= 750
WHERE pub.pages BETWEEN 500 AND 750
WHERE pub.pages <= 500 AND pub.pages >=750
Answer: A, B
Given the following class definition with numbered lines:
How do you specify to use this mock CDI bean implementation instead of the regular implementation class?
Use the alternatives element in the beans.xml file and specify the class name in the class element within it.
Start up the server with the optional â€“alternative command-line option, specifying any alternative class names in a comma-separated list.
Reorder the implementation names in the beans.xml file such that the desired alternative is listed earlier.
Delete the regular implementation class from the WAR.
Oracle 1Z0-900 Exam (Java EE 7 Application Developer) Detailed Information
1Z0-900 Java EE 7 Application Developer
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Test Code : 1Z0-900
Test Name : Java EE 7 Application Developer
Vendor Name : Oracle
Q&A : 69 Real Questions
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Java EE 7 Application Developer education
The Java EE 7 Tutorial: business Beans | 1Z0-900 Real Questions and VCE Practice Test
during this chapter you'll be trained all about commercial enterprise Beans, Session Beans, Message-pushed Beans.
This chapter is from the book ?
enterprise beans are Java EE add-ons that put into effect commercial enterprise JavaBeans (EJB) technology. enterprise beans run within the EJB container, a runtime atmosphere inside GlassFish Server (see area 1.four.2, “Container types”). besides the fact that children clear to the utility developer, the EJB container provides gadget-degree services, comparable to transactions and safety, to its business beans. These services permit you to at once build and installation commercial enterprise beans, which kind the core of transactional Java EE purposes.
right here issues are addressed here:
what is an commercial enterprise Bean?
what is a Session Bean?
what's a Message-pushed Bean?
having access to commercial enterprise Beans
The Contents of an enterprise Bean
Naming Conventions for enterprise Beans
The Lifecycles of business Beans
further information about commercial enterprise Beans
Written within the Java programming language, an business bean is a server-facet element that encapsulates the business good judgment of an utility. The business good judgment is the code that fulfills the intention of the software. In a list control utility, for instance, the commercial enterprise beans could enforce the enterprise good judgment in strategies known as checkInventoryLevel and orderProduct. via invoking these methods, purchasers can access the inventory capabilities supplied with the aid of the utility.
3.1.1 advantages of business Beans
For a few motives, business beans simplify the development of massive, allotted functions. First, because the EJB container offers system-degree features to enterprise beans, the bean developer can be aware of solving business issues. The EJB container, in place of the bean developer, is liable for gadget-level functions, comparable to transaction administration and security authorization.
second, because the beans as opposed to the purchasers include the utility’s business logic, the client developer can focus on the presentation of the customer. The customer developer doesn't should code the routines that put into effect enterprise suggestions or entry databases. in consequence, the consumers are thinner, a benefit it truly is mainly important for shoppers that run on small devices.
Third, because commercial enterprise beans are portable add-ons, the utility assembler can build new applications from current beans. provided that they use the standard APIs, these functions can run on any compliant Java EE server.
3.1.2 When to make use of commercial enterprise Beans
remember to accept as true with the use of enterprise beans in case your software has any of here necessities.
The utility should be scalable. To accommodate a becoming number of clients, you could need to distribute an utility’s components across assorted machines. no longer best can the enterprise beans of an software run on different machines, but additionally their place will remain clear to the valued clientele.
Transactions need to ensure statistics integrity. commercial enterprise beans support transactions, the mechanisms that manage the concurrent entry of shared objects.
The software can have a lot of consumers. With only a couple of strains of code, remote shoppers can comfortably locate commercial enterprise beans. These shoppers can also be thin, various, and a large number of. 3.1.3 forms of business Beans
table 3–1 summarizes the two sorts of commercial enterprise beans. the following sections talk about each type in additional element.
table three–1 enterprise Bean types
enterprise Bean category
Performs a role for a consumer; optionally, can also enforce an internet service
Acts as a listener for a specific messaging type, such because the Java Message carrier API
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