A ____ is a security system that essentially creates a barrier between a computer or a network and the Internet in order to protect against unauthorized access.

A. Trojan horse
B. hub
C. firewall
D. bridge


Answer: C

Computer Science & Information Technology

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Analyze the following code.

``` import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.stage.Stage; public class Test extends Application { @Override // Override the start method in the Application class public void start(Stage primaryStage) { // Create a button and place it in the scene Button btOK = new Button("OK"); btOK.setOnAction(e -> System.out.println("OK 1")); btOK.setOnAction(e -> System.out.println("OK 2")); Scene scene = new Scene(btOK, 200, 250); primaryStage.setTitle("MyJavaFX"); // 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 button, the program displays OK1 OK2. b. When clicking the button, the program displays OK1. c. When clicking the button, the program displays OK2. d. The program has a compile error, because the setOnAction method is invoked twice.

Computer Science & Information Technology

The process to induce you to provide personal information through a website is called cyberstalking

Indicate whether the statement is true or false.

Computer Science & Information Technology

Links can be ____.

A. graphics B. words C. either a. or b. D. neither a. nor b.

Computer Science & Information Technology

The only way to test for an empty queue is to check the queue count.

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

Computer Science & Information Technology