Analyze the following code.

```
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class Test extends Application {
@Override // Override the start method in the Application class
public void start(Stage primaryStage) {
Button btOK = new Button("OK");
Button btCancel = new Button("Cancel");

EventHandler handler = new EventHandler() {
public void handle(ActionEvent e) {
System.out.println("The OK button is clicked");
}
};

btOK.setOnAction(handler);
btCancel.setOnAction(handler);

HBox pane = new HBox(5);
pane.getChildren().addAll(btOK, btCancel);

Scene scene = new Scene(pane, 200, 250);
primaryStage.setTitle("Test"); // Set the stage title
primaryStage.setScene(scene); // Place the scene in the stage
primaryStage.show(); // Display the stage
}

/**
* The main method is only needed for the IDE with limited JavaFX
* support. Not needed for running from the command line.
*/
public static void main(String[] args) {
launch(args);
}
}```
a. When clicking the OK button, the program displays The OK button is clicked.
b. When clicking the Cancel button, the program displays The OK button is clicked.
c. When clicking either button, the program displays The OK button is clicked twice.
d. The program has a runtime error, because the handler is registered with more than one source.


ab

Computer Science & Information Technology

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As computers continue increasing in power, we’ll be able to solve more problems with sheer computer power and relatively unsophisticated algorithms. This is the “brute force” approach to problem solving.

a) Use random number generation to enable the knight to walk around the chessboard (in its legitimate L-shaped moves, of course) at random. Your program should run one tour and print the final chessboard. How far did the knight get? b) Most likely, the preceding program produced a relatively short tour. Now modify your program to attempt 1000 tours. Use a one-dimensional array to keep track of the number of tours of each length. When your program finishes attempting the 1000 tours, it should print this information in neat tabular format. What was the best result? c) Most likely, the preceding program gave you some “respectable” tours, but no full tours. Now “pull all the stops out” and simply let your program run until it produces a full tour. [Caution: This version of the program could run for hours on a powerful computer.] Once again, keep a table of the number of tours of each length, and print this table when the first full tour is found. How many tours did your program attempt before producing a full tour? How much time did it take? d) Compare the brute force version of the Knight’s Tour with the accessibility heuristic version. Which required a more careful study of the problem? Which algorithm was more difficult to develop? Which required more computer power? Could we be certain (in advance) of obtaining a full tour with the accessibility heuristic approach? Could we be certain (in advance) of obtaining a full tour with the brute force approach? Argue the pros and cons of brute force problem solving in general.

Computer Science & Information Technology

Online dictionaries, resources, and websites are sources of information on selected or entered text presented in the ________

Fill in the blank(s) with correct word

Computer Science & Information Technology

To display more of a document or other item in the window of an Office program, some users prefer to maximize the Ribbon.

Answer the following statement true (T) or false (F)

Computer Science & Information Technology

What will the following code display?

``` #include using namespace std; void showDub(int); int main() { int x = 2; showDub(x); cout << x << endl; return 0; } void showDub(int num) { cout << (num * 2) << endl; } ``` a. 2 2 b. 4 2 c. 2 4 d. 4 4

Computer Science & Information Technology