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Question-1. What is Xojo?
Answer-1: Xojo is a cross-platform development tool for creating desktop, web, and mobile applications.
Question-2. What programming language does Xojo use?
Answer-2: Xojo uses its own object-oriented language called Xojo, which is similar to BASIC.
Question-3. What platforms does Xojo support?
Answer-3: Xojo supports macOS, Windows, Linux, iOS, Web, and Raspberry Pi.
Question-4. What is an Event in Xojo?
Answer-4: An event is a predefined behavior or response to user interaction, such as a button click or window opening.
Question-5. How do you create a new project in Xojo?
Answer-5: Open Xojo, select the project type (Desktop, Web, etc.), and click "Create New Project."
Question-6. What is a Module in Xojo?
Answer-6: A Module is a container for shared methods, properties, and constants that can be accessed globally.
Question-7. What is a Control in Xojo?
Answer-7: A Control is a UI element like buttons, text fields, and labels used to design interfaces.
Question-8. How do you handle errors in Xojo?
Answer-8: Use the Try...Catch block to handle runtime errors.
Question-9. What is a Method in Xojo?
Answer-9: A Method is a reusable block of code that performs a specific task.
Question-10. What is a Class in Xojo?
Answer-10: A Class is a blueprint for creating objects with properties, methods, and events.
Question-11. How do you declare a variable in Xojo?
Answer-11: Use Dim keyword, e.g., Dim myVar As Integer.
Question-12. What are Properties in Xojo?
Answer-12: Properties are variables defined at the class level to hold data related to an object.
Question-13. What is an Interface in Xojo?
Answer-13: An Interface defines a set of methods that a class must implement.
Question-14. What is the default data type for a variable in Xojo?
Answer-14: Variables must always be explicitly defined with a data type; there is no default.
Question-15. How do you create a Constructor in Xojo?
Answer-15: Use a Sub method named Constructor in your class.
Question-16. What is the App object in Xojo?
Answer-16: The App object represents the application and provides global event handlers.
Question-17. How do you open a new window in Xojo?
Answer-17: Use WindowName.Show to open a window.
Question-18. How do you create a thread in Xojo?
Answer-18: Add a Thread control to your project and define its behavior in the Run event.
Question-19. What is a Timer in Xojo?
Answer-19: A Timer is a control that triggers an action at regular intervals.
Question-20. How do you connect to a database in Xojo?
Answer-20: Use the Database class, e.g., db.Connect.
Question-21. What is a Container Control in Xojo?
Answer-21: A Container Control is a reusable group of controls that can be embedded in other windows or views.
Question-22. How do you define a constant in Xojo?
Answer-22: Use the Const keyword, e.g., Const Pi As Double = 3.14.
Question-23. What is a Delegate in Xojo?
Answer-23: A Delegate is a reference to a method, allowing you to pass methods as parameters.
Question-24. What is the MessageBox function in Xojo?
Answer-24: MessageBox displays a simple dialog box with a message.
Question-25. What is a Dictionary in Xojo?
Answer-25: A Dictionary is a collection of key-value pairs.
Question-26. How do you work with JSON in Xojo?
Answer-26: Use the JSONItem class to parse and generate JSON.
Question-27. What is the Try...Catch statement in Xojo?
Answer-27: Try...Catch is used to handle exceptions during runtime.
Question-28. What is the purpose of the RaiseEvent statement?
Answer-28: RaiseEvent is used to invoke a custom event defined in a class.
Question-29. How do you iterate through an array in Xojo?
Answer-29: Use a For Each loop, e.g., For Each item As String In myArray.
Question-30. What is the purpose of #Pragma in Xojo?
Answer-30: #Pragma provides compiler directives to optimize or control compilation behavior.
Question-31. How do you perform file operations in Xojo?
Answer-31: Use the FolderItem and TextOutputStream or TextInputStream classes.
Question-32. How do you create a Web project in Xojo?
Answer-32: Select "Web" as the project type in the Xojo IDE.
Question-33. What is the difference between Private and Protected in Xojo?
Answer-33: Private restricts access to within the same module, while Protected allows access to subclasses.
Question-34. How do you define an Event in Xojo?
Answer-34: Use the AddHandler statement to assign a method to an event.
Question-35. How do you implement inheritance in Xojo?
Answer-35: Use the Inherits keyword in the class declaration.
Question-36. What is the Select Case statement in Xojo?
Answer-36: Select Case is a conditional statement used to evaluate multiple conditions.
Question-37. How do you use plugins in Xojo?
Answer-37: Install plugins into the Xojo plugins folder and restart the IDE to access them.
Question-38. What is the Build Settings section in Xojo?
Answer-38: It allows you to configure platform-specific build options for your project.
Question-39. How do you create a Menu in Xojo?
Answer-39: Use the Menu Editor in the Xojo IDE to design and assign menus to windows.
Question-40. How do you debug a Xojo application?
Answer-40: Use the built-in debugger to set breakpoints and inspect variables at runtime.
Question-41. What is the purpose of the Do...Loop statement?
Answer-41: Do...Loop creates a loop that executes while or until a condition is met.
Question-42. How do you add a custom class in Xojo?
Answer-42: Right-click the project navigator and select "Add Class."
Question-43. What is a WebDialog in Xojo Web projects?
Answer-43: A WebDialog is a modal dialog for displaying additional UI in a web application.
Question-44. How do you implement Multithreading in Xojo?
Answer-44: Use the Thread class to run tasks concurrently.
Question-45. How do you format dates in Xojo?
Answer-45: Use the DateTime class and its formatting methods.
Question-46. How do you add a library or external code in Xojo?
Answer-46: Drag the library file into the project or use the Declare statement for native APIs.
Question-47. What is the purpose of the Exit statement?
Answer-47: Exit is used to prematurely terminate loops or methods.
Question-48. How do you handle mouse events in Xojo?
Answer-48: Use Mouse-related events like MouseDown, MouseUp, and MouseMove in controls.
Question-49. How do you use arrays in Xojo?
Answer-49: Declare an array with Dim, e.g., Dim myArray() As Integer, and manipulate it using methods like Append or Remove.
Question-50. What is the Super keyword in Xojo?
Answer-50: Super is used to call the superclass version of a method or event handler.
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