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Learn POLICE SI MCQs with answers [Page 2 of Department 70]
11) The part of a computer that coordinates all its functions is called its
(A) Arithmetic logic unit
(B) System board
(C) Control unit
(D) ROM program
Correct Answer - Option
(C)
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.
12) To access properties of an object, the mouse technique to use is _________ .
(A) right-clicking
(B) dropping
(C) shift-clicking
(D) dragging
Correct Answer - Option
(A)
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.
13) Which of the following controls the manner of interaction between the user and the operating system?
(A) user interface
(B) language translator
(C) platform
(D) icon
Correct Answer - Option
(A)
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.
14) Which of the following search engines continuously sends out that starts on a homepage of a server and pursue all links stepwise ?
(A) Cookies
(B) Spiders
(C) Packets
(D) Paddle
Correct Answer - Option
(B)
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.
15) The signal that a computer is waiting for a command from the user --
(A) time slice
(B) interrupt
(C) event
(D) prompt
Correct Answer - Option
(D)
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
16) In DOS, which of the following command is used to delete all the files as well as sub-directories of a directory?
(A) Delete
(B) Move
(C) Del
(D) Deltree
Correct Answer - Option
(D)
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[...]]
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