30000+ Important MCQs for POLICE SI

Explanation: The part of a computer that coordinates all its functions is called Control Unit. It is considered as the heart of the computer system because it controls the overall operation and function of the computer system. It controls all the other units, directs them to work in an appropriate system and organizes various operations performed.

Explanation: Right-clicking an item usually displays a list of things you can do with the item. For eg. when you right-click the recycle bin on your desktop, windows displays a menu allowing you to open it, empty it, delete it or see its properties.

Explanation: A User interface refers to a visual part of computer application or operating system through which a user interacts with a computer or a software. It determines how commands are given to the computer or the program and how information is displayed on the screen. Three main types of user interfaces are- command language, Menus and Graphical user interface.

Explanation: A program that automatically fetches Web pages. Spiders are used to feed pages to search engines. It's called a spider because it crawls over the web. Another term for these programs is Web Crawler.

Explanation: A prompt is a sign to indicate that the computer is waiting for a command from the user. Type your command, then press 'Enter' key to execute the command

Explanation: Deltree, short for delete tree, is a command in DOS to delete a directory including all files and sub directories that are in it. All files and sub directories subordinate to the directory you are deleting will also be deleted regardless of any attributes. This means that even if a file has hidden, system, read only or other attributes, it will still be deleted : DELTREE [1Y] [drive :] path [[drive:] [path[...]]