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Oracle 1z0-900 Exam Actual Questions

The questions for 1z0-900 were last updated on July 8, 2024.
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  • Viewing questions 1-4 out of 142 questions
 

Topic 1 - Single Topic

Question #1 Topic 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.
Reveal Solution Hide Solution   Discussion   3

Correct Answer: A 🗳️

Question #2 Topic 1

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
Reveal Solution Hide Solution   Discussion   3

Correct Answer: BD 🗳️

Question #3 Topic 1

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
Reveal Solution Hide Solution   Discussion  

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

Question #4 Topic 1

Given the code fragment:

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

  • A. <base url>/Employees/89724
  • B. <base url>/Employees/J6349
  • C. <base url>/Employees/id:a7280
  • D. <base url>/Employees/id/J6349
Reveal Solution Hide Solution   Discussion   4

Correct Answer: B 🗳️

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