Which is an example of visual basic objects mcq. 1000 complianceportal.american.edu MCQ (Multiple Choice Questions) 2022-10-28
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Visual Basic (VB) is an object-oriented programming language that was developed by Microsoft in the 1990s. It is a derivative of the BASIC programming language, which was popular in the 1970s and 1980s. One of the key features of VB is its use of objects, which are self-contained units that encapsulate data and functionality.
Objects in VB are created from classes, which are templates that define the properties and behaviors of an object. For example, a "Button" class might define a button object with properties such as "Caption" (the text displayed on the button) and "Enabled" (whether the button is clickable). The Button class might also define behaviors such as "Click," which is triggered when the button is clicked.
An example of a VB object might be a form, which is a window that appears on the screen and contains other objects such as buttons, text boxes, and labels. A form object might have properties such as "Caption" (the text displayed in the title bar) and "Visible" (whether the form is currently shown on the screen). It might also have behaviors such as "Load," which is triggered when the form is first displayed, and "Close," which is triggered when the user clicks the close button.
In a multiple choice question (MCQ) about VB objects, an example might be:
Which of the following is an example of a VB object?
A) An integer variable
B) A form
C) A loop
D) A function
The correct answer would be B) A form, as a form is an example of a VB object. An integer variable (A) is a basic data type and not an object, a loop (C) is a control structure, and a function (D) is a block of code that performs a specific task, but it is not an object.
Which is an example of Visual Basic Objects?
. The programmer uses the Name property to refer to the menu element in code. But the length is a total number of elements in the array, which is 4. The Visual Basic Boolean variable type holds a value of true or false. Now, we will learn what are the classes and objects in visual basic and how to use it in visual basic applications with examples.
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Here D forces the double number 0. This will help you to prepare for exams, contests, online tests, quizzes, viva-voce, interviews, and certifications. What do you call an object in Visual Basic? Objects are things that you can program with, things that make programming easier. Each object in Visual Basic is defined by a class. The class is used to create objects. FileSystem Provides properties and methods for working with drives, files, and directories.
Which of the following extension is used to represent the project file in Visual Basic? For example, you might add a ReverseColors method, and your derived class might look as follows: Public Class ReversibleButton Inherits System. Are constructor is a special type of? In visual basic language what are the rules of a programming language called? Reverse method reverses the array list. Ports Provides a property and a method for accessing the computer's serial ports. If you type the period following the class name itself, IntelliSense lists all the shared members and none of the instance members. Objects newly created from a class are often identical to each other. Objects are instances of classes; you can create as many objects as you need once you have defined a class. Another difference is that unlike standard modules, classes can implement interfaces.
Visual Objects is an object-oriented computer programming language that is used to create computer programs that operate primarily under Windows. Close instruction tells the computer to close the current form. Answer: d Explanation: The above expression calculates for a loan of Rs. Log Provides a property and methods to write event and exception information to the application's log listeners. A dataset B datatable C recordset D relationshipset 14. If you observe the above image, we used various data members like access modifiers, We will learn more about visual basic access modifiers, Visual Basic Class Members As discussed, a Class can contain multiple data members in a visual basic programming language. Class hierarchies are useful when describing items that are a subtype of a more general class.
Answer: c Explanation: Each menu contains a menu title, which appears on the menu bar at the top of the form. While D For Each ………… While 2. Hierarchical relationship When classes are derived from more fundamental classes, they are said to have a hierarchical relationship. For more information, see Fields and properties Fields and properties represent information stored in an object. Which of the following is commonly used to perform an immediate action when clicked in Visual Studio? In the instruction Me is a keyword that refers to the current form and Close is one of the methods available in visual basic. Start Note that a method is simply a procedure that is exposed by an object.
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They contain a set of methods and properties that allow you to make the object do certain things without actually having to look at the objects code. A class describes the variables, properties, procedures, and events of an object. Better yet, you may be able to save yourself some work by using a spelling checker class that someone else has already developed. Else Region Class Object Form Property Dim Const Enum Class They are pre-built. If you have a lot of users using a database object for example, then you may want to open and close connections for each user. Answer: b Explanation: The class statement is used to define a class in visual basic. Button Your new class inherits all the members defined by the base class.
When we execute the above visual basic program, we will get the result like as shown below. Derived classes inherit members from the class they are based on, allowing you to add complexity as you progress in a class hierarchy. In visual basic, Classes and Objects are interrelated. Better yet, you may be able to save yourself some work by using a spelling checker class that someone else has already developed. User Provides access to information about the current user. The class in visual basic is nothing but a collection of various data members object in visual basic is an instance of a class to access the defined properties and methods.
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Following is the declaration of class in a visual basic programming language. Clock Provides properties for accessing the current local time and Universal Coordinated Time equivalent to Greenwich Mean Time from the system clock. Keyboard Provides properties for accessing the current state of the keyboard, such as what keys are currently pressed, and provides a method to send keystrokes to the active window. When you click a menu title, its corresponding menu opens and displays a list of options, called menu items. A Abstraction B Encapsulation C Polymorphism D Inheritance 19. If the current form is the only form, then this instruction closes the application. Which of the following returns a value after performing its specific task in Visual Basic? Which of the following applications can be developed using Visual Basic tool? For more information, see Events An event is an action recognized by an object, such as clicking the mouse or pressing a key, and for which you can write code to respond.