Oracle 1Z0-900 Exam Dumps Updated: 142 Practice Exam Questions and Answers

On By passitdump

Want to prepare for the Oracle 1Z0-900 exam? PassITDump’s latest 1Z0-900 exam dumps have been updated and are available.

Our 1Z0-900 exam dumps contains 142 practice questions and answers, enough for you to pass the exam. As long as you practice seriously!

We have sample questions for 1Z0-900 free dumps. You can download and check the real questions of updated 1Z0-900 dumps.

Question 1:

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?

A. Create two @onMessage methods in the same endpoint with appropriate parameter types.

B. Define the @onMessage methods in your endpoint with Object as parameter and check the actual type in your code.

C. You can achieve this only by creating separate WebSocket endpoints for each message type.

D. Create two @onMessage methods, each with appropriate decoder attribute in the same endpoint.

Correct Answer: D

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

Question 2:

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

A. protecting data from unauthorized viewing by using encryption

B. verifying that a user is allowed to perform an action

C. ensuring that data is not modified in transit

D. verifying identity claims from users

Correct Answer: BC

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

Question 3:

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

A. the Runnable Interface

B. the ManagedExecutorTask interface

C. the TaskEventListener interface

D. the ManagedTaskListener interface

Correct Answer: D

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

Question 4:

Given the code fragment: Which URL triggers the invocation of the getEmployee () method?

A. /Employees/89724

B. /Employees/J6349

C. /Employees/id:a7280

D. /Employees/id/J6349

Correct Answer: B

Question 5:

What is true about Message-Driven Beans (MDBs)?

A. MDBs can participate in transactions.

B. MDBs are invoked synchronously.

C. Each MDBs can process messages only from a single client.

D. MDBs retain data caches between client calls.

Correct Answer: A

Reference: https://docs.oracle.com/javaee/7/tutorial/ejb-intro003.htm

Question 6:

Given the code fragment: Which code can be added to register both of these methods to receive BankEvent notifications only if an instance of BankActivityService is already instantiated in the current context?

A. @Observes(notifyObserver=IF_EXISTS) on line 3 and line 6

B. @Observes(during=IN_PROGRESS) on line 1

C. @Observes(during=AFTER_COMPLETION) on line 1

D. @Observes(notifyObserver=IF_EXISTS) on line 4 and line 7 before method parameter declaration

Correct Answer: A

Reference https://docs.oracle.com/javaee/7/tutorial/cdi-adv005.htm

Question 7:

Which code snippet prints the exception error message as part of the page output?

A.

B.

C.

D.

Correct Answer: D

Reference: https://www.geeksforgeeks.org/3-different-ways-print-exception-messages-java/

Question 8:

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

A. X.509 certificates

B. SAML tokens

C. OAuth Bearer tokens

D. Two-factor authentication tokens

Correct Answer: AB

Question 9:

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.)

A.

B.

C.

D.

E.

Correct Answer: CE

Question 10:

Given the code fragment:

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

A. u.setProperty(String, Object)

B. u.setProperty(Schema)

C. u.setEventHandler(ValidationEventHandler)

D. u.setAdapter(XmlAdapter)

Correct Answer: D

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

Question 11:

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

A. /general-error.html

B. * /general-error.html

C. * /general-error.html

D. /general-error.html

Correct Answer: B

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

Question 12:

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.)

A. Replace line 2 with: @Inject public void setAcc(Account acc)

B. Replace line 3 with: @Inject public Account getAcc()

C. Replace line 1 with: @Inject private Account acc;

D. Replace line 3 with: public @Inject Account getAcc()

E. Replace line 1 with: private @Inject Account acc;

F. Replace line 2 with: public void setAcc(@Inject Account acc)

Correct Answer: DF

Question 13:

Given:

How often does the submitted task run?

A. need more details to determine

B. once

C. as many times as you like

D. based on a schedule

Correct Answer: A

Question 14:

Given:

What code needs to be added to line 1 for MyMapper bean instances to be correctly passivated?

A. @Stateless @PassivationCapable

B. @Stateless

C. @Stateful @PassivationCapable

D. @Stateful

Correct Answer: D

Reference: https://docs.oracle.com/javaee/6/tutorial/doc/giplj.html#gipln

Question 15:

Which URL represents an invalid approach to pass a parameter to a REST resource?

A. /Employees?value=1

B. /Employeesandvalue=1

C. /Employees/1

D. /Employees;value=1

Correct Answer: D