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Java EE 7 Application Developer Exam Questions

Oracle

Java EE 7 Application Developer

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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? 

Answer options:

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.