Understanding Operating Systems: Functions, Types, and Utility Programs, Lecture notes of Operating Systems

Download Understanding Operating Systems: Functions, Types, and Utility Programs and more Lecture notes Operating Systems in PDF only on Docsity!

Pertemuan 6 Understanding Operating Systems

Learning Outcomes

Pada akhir pertemuan ini, diharapkan mahasiswa

akan mampu :

• menguraikan jenis dan fungsi sistem operasi pada komputer

System Software

• What is system software?

Ø Programs that control the operations of the computer Ø Serves as the interface between the user, the application software, and the computer’s hardware

Operating Systems

• What are the functions of an operating system?

monitorperformance

provide a user interface

provide filemanagement and other utilities

establish anInternet connection

control anetwork

administersecurity

start the computer manage programs

schedule jobs andconfigure devices

managememory

Operating System Functions

•What messages display on the screen when you boot the computer?

Operating System Functions

• How does a personal computer boot up?

Step 1. sends signal to com- Power supply ponents in system unit

Step 4. compared with data in CMOS chip Results of POST are

Step 2. accesses BIOS to start Processor computer Step 3. called the BIOS runs tests, POST , to check components suchas mouse, keyboard, and adapter cards

Step 5. in floppy disk drive or CD/DVD BIOS looks for system files drive, and then hard disk Step 6. system loads into RAM Kernel (core) of operating Step 7. configuration information and Operating system loads displays desktop on screen

Operating System Functions

•What is a graphical user interface (GUI)? Ø User interacts with menus and visual images such as icons and buttons

Operating System Functions

•What is single user/ multitasking?

• Foreground contains program you are using
• Background contains programs that are running but are not in use

Ø Working on two or more programs that reside in memory at same time

Operating System Functions

• What is spooling?

Ø Sending print jobs to buffer instead of directly to printer Ø Print jobs line up in queue

Operating System Functions

• What is a device driver?

DeviceDevice DriverDriver

Program thatProgram that tells operating systemtells operating system how to communicatehow to communicate with devicewith device

WithWith Plug and PlayPlug and Play,, operating systemoperating system automatically configuresautomatically configures new devices as younew devices as you Also calledAlso called driverdriver install theminstall them

Operating System Utility Programs

• What is a utility program?

Ø System software that performs maintenance-type tasks § Also called utility

Operating System Utility Programs

• What is a file manager?

Ø Performs functions such as copying, renaming, deleting, and moving files Ø Image viewer displays contents of graphics file when you double click on it

Operating System Utility Programs

• What is a disk scanner? Ø Detects and corrects problems on hard disk or floppy disk Ø Searches for and removes unnecessary files

Operating System Utility Programs

• What is a backup utility?

Ø Copies selected files or entire hard disk onto another disk or tape Ø Most compress files during backup to require less storage space