1z0-900: Java EE 7 Application Developer - Free download from Exam Files

You need to develop a chat application, which allows the display of emoticons and images together with text messages.

How should you configure a WebSocket endpoints to receive both text and binary messages?

Create two @onMessage methods in the same endpoint with appropriate parameter types.
Define the @onMessage methods in your endpoint with Object as parameter and check the actual type in your code.
You can achieve this only by creating separate WebSocket endpoints for each message type.
Create two @onMessage methods, each with appropriate decoder attribute in the same endpoint.

Correct answer: D

Explanation:

Reference: https://abhirockzz.gitbooks.io/java-websocket-api-handbook/content/Receiving%20Messages.html

Which two capabilities are provided by the Java Authentication and Authorization Services (JAAS) API? (Choose two.)

protecting data from unauthorized viewing by using encryption
verifying that a user is allowed to perform an action
ensuring that data is not modified in transit
verifying identity claims from users

Correct answer: BC

Explanation:

Reference: https://docs.oracle.com/javase/8/docs/technotes/guides/security/jaas/JAASRefGuide.html

Which interface should you implement if you want to be alerted to the lifecycle events surrounding your task being executed by a ManagedExecutorService?

the Runnable Interface
the ManagedExecutorTask interface
the TaskEventListener interface
the ManagedTaskListener interface

Correct answer: D

Explanation:

Reference: https://github.com/javaee/concurrency-ee-spec/blob/master/api/src/main/java/javax/enterprise/concurrent/ManagedExecutorService.java

Given the code fragment:

Which URL triggers the invocation of the getEmployee () method?

<base url>/Employees/89724
<base url>/Employees/J6349
<base url>/Employees/id:a7280
<base url>/Employees/id/J6349

Correct answer: B

Java EE’s support for WS-Security includes handling which two types of security credentials? (Choose two.)

X.509 certificates
SAML tokens
OAuth Bearer tokens
Two-factor authentication tokens

Correct answer: AB

Given the code fragment from a Facelet page:

On Line 1, you ae asked to insert a search box that displays the text “Search Here” via a placeholder.

Assume searchMB is a valid Managed Bean.

Which two options enable you to create a search box with a placeholder attribute on Line 1? (Choose two.)

<h:inputText value=“#(searchMB.query)”>
<f:param name=“placeholder” value=“Search Here”/>
</h:inputText>
<h:inputText value=“#(searchMB.query)” placeholder=“Search here”/>
<input jsf:id=“search” placeholder=“Search here” jsf:value=“# (searchMB.query)”></input>
<h:inputText pt:placeholder=“Search Here” value=“#(searchMB.query)”/>
<input id=“search” jsf:placeholder=“Search Here” value=“$(searchMB.query)”></input>

Correct answer: CE

Given the code fragment:

Which method should be used on line 3 to enable default validation mechanism?

u.setProperty(String, Object)
u.setProperty(Schema)
u.setEventHandler(ValidationEventHandler)
u.setAdapter(XmlAdapter)

Correct answer: D

Explanation:

Reference: https://docs.oracle.com/javaee/6/api/javax/xml/bind/Unmarshaller.html

How do you specify a default error page in your web.xml file?

<on-error>
<location>/general-error.html<location>
</on-error>
<error-page>
<error-code>*</error-code>
<location>/general-error.html</location>
</error-page>
<on-error>
<error-code>*</error-code>
<location>/general-error.html</location>
</on-error>
<error-page>
<location>/general-error.html</location>
</error-page>

Correct answer: B

Explanation:

Reference: http://www.codejava.net/java-ee/servlet/how-to-handle-error-in-web-xml-for-java-web-applications

Given the code fragment:

And

Which two steps, when performed independently, enable the index.xhtml page to print the following text: The Id is 12345? (Choose two.)

Replace line 2 with: @Inject public void setAcc(Account acc)
Replace line 3 with: @Inject public Account getAcc()
Replace line 1 with: @Inject private Account acc;
Replace line 3 with: public @Inject Account getAcc()
Replace line 1 with: private @Inject Account acc;
Replace line 2 with: public void setAcc(@Inject Account acc)

Correct answer: DF

Given the code fragments:

What code should you add to the body of the updateEmployee method in order to save pending changes to the database?

entityManager.merge(emp);

entityManager.merge(emp);
Context. Ctx = new InitialContext();
UserTransaction utx = (UserTransaction)ctx.lookup(“java:comp/UserTransaction”);
utx.begin();
entityManager.merge(emp);
utx.commit();
entityManager.lock(emp);
EntityManager.merge(emp);
entityManager.getTransaction().begin();
entityManager.merge(emp);
entityManager.getTransaction().commit();

Correct answer: B

Vendor:	Oracle
Exam Code:	1z0-900
Exam Name:	Java EE 7 Application Developer
Date:	Jul 24, 2019
File Size:	1 MB

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