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Oracle 1Z0-858 Exam Syllabus Topics:

Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:

1. Given that a web application consists of two HttpServlet classes, ServletA and ServletB, and the ServletA.service method:
20.
String key = "com.example.data";
21.
session.setAttribute(key, "Hello");
22.
Object value = session.getAttribute(key);
23.
Assume session is an HttpSession, and is not referenced anywhere else in ServletA.
Which two changes, taken together, ensure that value is equal to "Hello" on line 23? (Choose two.)

A) enclose lines 21-22 in a synchronized block:
synchronized(this) {
session.setAttribute(key, "Hello");
value = session.getAttribute(key);
}
B) ensure that the ServletA.service method is synchronized
C) ensure that the ServletB.service method is synchronized
D) enclose lines 21-22 in a synchronized block:
synchronized(session) {
session.setAttribute(key, "Hello");
value = session.getAttribute(key);
}
E) ensure that ServletB synchronizes on the session object when setting session attributes

2. A developer is designing a web application that must support multiple interfaces, including:
an XML web service for B2B HTML for web-based clients WML for wireless customers
Which design pattern provides a solution for this problem?

A) Data Access Object
B) Model-View-Controller
C) Session Facade
D) Chain of Responsibility
E) Business Delegate

3. Given a portion of a valid Java EE web application's directory structure:
MyApp | |-- Directory1 | |-- File1.html | |-- META-INF | |-- File2.html
|
|-- WEB-INF
|-- File3.html
You want to know whether File1.html, File2.html, and/or File3.html is protected from direct access by your web client's browsers.
What statement is true?

A) Only File1.html and File2.html are directly accessible.
B) Only File2.html is directly accessible.
C) Only File1.html is directly accessible.
D) All three files are directly accessible.
E) Only File1.html and File3.html are directly accessible.
F) Only File3.html is directly accessible.
G) Only File2.html and File3.html are directly accessible.

4. In your web application, you need to execute a block of code whenever the session object is first created. Which design will accomplish this goal?

A) Create an HttpSessionListener class and implement the sessionCreated method with that block of code.
B) Create a Filter class, call the getSession(false) method, and if the result was null, then execute that block of code.
C) Create an HttpSessionListener class and implement the sessionInitialized method with that block of code.
D) Create a Filter class, call the getSession(true) method, and if the result was NOT null, then execute that block of code.
E) Create an HttpSessionActivationListener class and implement the sessionCreated method with that block of code.

5. A developer has used this code within a servlet:
62.
if(request.isUserInRole("vip")) {
63.
// VIP-related logic here
64.
}
What else must the developer do to ensure that the intended security goal is achieved?

A) define a security-role named vip in the deployment descriptor
B) create a user called vip in the security realm
C) define a group within the security realm and call it vip
D) declare a security-role-ref for vip in the deployment descriptor

Solutions: