...................... are virtual base classes; that is they consist of members; methods, properties and events that have no implementations.

Related MCQs

• .................. namespace in vb.net includes essential classes and base classes that define commonly used data types, events and event handlers, interfaces, attributes, exceptions and so on.
• Specialized classes include the stack class, a last-in first-out structure, the queue class, first-in, first-out structure in the ........................ namespace.
• Which of the following is NOT the public events of TextBox objects.
• The file extension ................. in vb.net represents a global application class, used to handle global application class, used to handle global ASP.NET application level events.
• Which of the following is NOT the public properties of TextBox objects.
• Most of the functionally of the text box control is simply inherited from the ................. class, which is also the a base class for the rich text box control.
• In mouse cursor option ................... is a cursor for mouse wheel operations when the mouse is moving and the window is scrolling horizontally and vertically downward to the left.
• In mouse cursor option ................. is a cursor for mouse wheel operations when the mouse is moving and the window is scrolling vertically in an upward direction.
• Each hyperlink is a object of the ................... class and is stored in a collection called links.
• The SaveFile method is used to save the text in a rich text box to disk, and the ................ method to read it back.