MKA Chapter 9 : Operating system

 OPERATING SYSTEMS.

1.  What is operating system (OS)?

- a set of programs containing instructions that work together to coordinate all the activities among      computer and mobile device hardware.

ü  Start and shut down a computer or mobile device.

ü  Provide a user interface.

ü  Manage programs and memory.

ü  Coordinate tasks and configure devices.

ü  Monitor performance and establish Interner connection.

ü  Provide file management and other device/media related tasks

ü  Updating operating system software and control network.

2.  How to starting computers and mobile devices.

    -if a computer or mobile devices is off, you press a power button to turn it on.

3.  User interface (UI).

    -controls how you enter data and instructions and how information is displayed on the screen.

    -with a graphical user interface (UI), you interact with menus and visual images.

4.  How an operating systems handles programs directly affects you productivity?

ü  Single tasking and multitasking.

ü  Foreground and background.

ü  Single user and multiuser.

5.  Memory management optimizes the use of the computer or device’s internal memory.

6.  Virtual memory is a portion of a storage medium functioning as additional RAM.

7.  The operating systems determines the order in whish tasks are processed.

    -a driver is a small that tells the operating system how to communicate with a specific device.

    -plug and play automatically configures new devices as you install them.

8.  Operating systems typically provide a means to establish Internet connections.

9.  Operating systems often provide users with a variety of tools related to managing a computer, its device, or its programs.

ü  File manager and image viewer.

ü  Uninstaller and disk cleanup.

ü  Disk defragmenter and file compression.

ü  Search and pc maintenance.

ü  Backup and restore.

10.  Automatic update automatically provides new features or corrections to the program.

11.  A user account enables a use to sign in to, or acces resources on, a network or computer.

    -a username, or user ID, identifies a specific user.

    -a password is a private combination of characters associated with the user name.

                                                                        

12.  A desktop operating systems is a complete operating systems that works on desktops, laptops, and some tablets.

ü  Windows.

ü  Mac OS.

ü  UNIX.

ü  Linux.

13.  Windows 8 offers these features :

ü  Start screen interface with tiles.

ü  Includes yhe desktop interface.

ü  Support for input via touch, mouse, and keyboard.

ü  Email app, calendar app, and browser included.

ü  Enhanced security through an antivirus program, firewall, and aoutomatic updates.

ü  Windows Store offers additional applications for purchase.

14.  The Macintosh operating systems has earned a reputation for its ease of use.

    - latest version is OS X.

15.  UNIX is a multitasking operating system developed in the early 1970s

16.  Linux is a popular, multitasking UNIX-based operating system.

Server operating systems.

ü  Windows server.

ü  OS X server.

ü  UNIX.

ü  Linux.

Mobile operating system.

-the operating system on mobile devices and many customer electronics is called a mobile operating system and resides on firmware.

ü  Android. (an open sources, Linux-based mobile operating system designed by Google for smartphones and tablets)

ü  iOS. (developed by Apple, is a proprietary mobile operating system specificially made for Apple’s mobile device)

ü  Windows Phone. (developed by Microsoft, is a propriertary mobile operating system that runs on some smartphone)

Summary.

    -functions common to most operating systems.

    -variety of desktop operating systems, server operating systems, and mobile operating systems.