QUESTION 70 You use a MediaPlayer object to obtain the source of the media. True

Question

QUESTION 70

You use a MediaPlayer object to obtain the source of the media.

True

False

1 points   

QUESTION 71

You cannot have a main() method in a JavaFX application.

True

False

1 points   

QUESTION 72

Every JavaFX application must extend javafx.application.Application.

True

False

1 points   

QUESTION 73

Given: public class MyList extends ArrayList {...}, you(r) _________.

functionality known at compile time is limited to that of Object

know the concrete type used at runtime must be numeric

know the actual type of the parameter at compile time

require a minimum concrete type, other than Object, to be used

2 points   

QUESTION 74

An interface can contain only abstract methods and variables.

True

False

1 points   

QUESTION 75

An event source object and a listener object can be the same.

True

False

1 points   

QUESTION 76

Lines 12-13 only

Line 15 only

Lines 12-13 and line 15

None - no output from these lines of code

2 points   

QUESTION 77

You cannot inherit from one exception class to another.

True

False

1 points   

QUESTION 78

A JavaFX application begins with the start() method, which is called after the Java Virtual Machine (JVM) calls the launch() method.

True

False

1 points   

QUESTION 79

Yes, this works, although it is less specific than it could be

Yes, and you cannot be more specific

No, the Exception class is only used for inheritance by subclasses, not directly

No. You must use a specific exception class appropriate to this error

a.

functionality known at compile time is limited to that of Object

b.

know the concrete type used at runtime must be numeric

c.

know the actual type of the parameter at compile time

d.

require a minimum concrete type, other than Object, to be used

Explanation / Answer

QUESTION 70

You use a MediaPlayer object to obtain the source of the media.

Answer :TRUE

Media Player class provides the source code for creating applications for media. It contains combination of Media and MediaView to track media streaming like audio, video etc.

Eg:

Public Class WindowsMediaPlayer extends javafx.scene.media.MediaPlayer {

Void play() {}

Void pause() {}

Void stop() {}

Void seek() {}

}

QUESTION 71

You cannot have a main() method in a JavaFX application.

Answer : FALSE

   The above question could be “need not” instead of “Cannot”, because JavaFX application can contain main() method even though the application contain start() method to start the application. The reason behind this is, we can run Jar file that are created without FX Launcher. Ofcourse java swing applications with Java FX needs main method to implement.

Eg:

Public class Home extends Application {

Public void start(Stage s) {}

Public void stop() {}

   Public static void main(String []args) { }

}

QUESTION 72

Every JavaFX application must extend javafx.application.Application.

Answer: TRUE

Yes it is needed to extend Application class for every Java FX program because to invoke the application methods like start() and stop() to be overridden. Java FX creates Application thread to work on Scene and Stage objects for input processing

QUESTION 74

An interface can contain only abstract methods and variables

Answer : FALSE

Interface contain abstract methods, final variables and also inner interfaces.

interface GreetDemo {

   static final String greet="Good";

   public abstract hello(String msg);

  

   interface Morning {

       static final String session="Morning";

   }

}

QUESTION 75

An event source object and a listener object can be the same.

Answer: FALSE

Event Source and Listener object are different in meaning, but finally mean to do common together job. Event Source Object is the GUI component on which the event to be raised and Listener Object is the interface which works on that Event Source object.

Eg:

Class Home extends Frame implements ActionListener {   Button b; // Event Source

            Public Home() {

                        B = new Button(“Click”);

                        b.addActionListener(this); // Listener Object

}

public void actionPerformed(ActionEvent ae) {

}

}

QUESTION 77

You cannot inherit from one exception class to another.

Answer : FALSE

We can inherit one exception class to another, Generally all exceptions are inherited from Exception Class. And all unchecked exceptions inherited from RuntimeException. Also a User Defined Exception class can also be inherited from Exception class.

Eg:

Class MadhuException extends Exception {

   Public MadhuException(String msg) {

            Super(msg);

   }

}

QUESTION 78

A JavaFX application begins with the start() method, which is called after the Java Virtual Machine (JVM) calls the launch() method.

Answer : TRUE

   When ever application is launched, Java JVM at runtime calls start() method to create a event Stage in the FX application, so no need to call the object to instantiate for Application since start() is the init() like method to start proceedings for running FX applications like a thread.

Eg:

Public class Home extends Application {

Public void start(Stage s) {}

Public void stop() {}

   Public static void main(String []args) { }

}

QUESTION 76 some data missing(image not displayed)

QUESTION 79: some data missing(image not displayed)

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