Chapter 9
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 Internet 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 which 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 the 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 automatic 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.
Comments
Post a Comment