FIT1047 Final: Operating Systems
31 May 2018
School
Department
Course
Professor
Operating Systems
Saturday, 26 May 2018
7:23 PM
An Operating System (OS) is a piece of software (a program) or a collection of different pieces of
software that manages the resources in a computer and provides a convenient interface between
application programs and the hardware.
An Operating System provides a level of abstraction between hardware and software.
Computer
• As a programmer, you do not need to know how hardware works
• By calling a function in the OS, you can send a message to another computer via the internet
Operating System Core Tasks
• Managing multiple processes running in parallel
o A process is a program that is currently being executed
• Managing the memory that processes use
• Provides access to file systems, the network and other I/O resources
The core functionality of an OS is provided by the Operating System Kernel, or kernel for short.
Abstraction
• Main goals of an OS is to make computers easier to use, for both end users and programmers
• For end users, an OS typically provides a consistent user interface, and it manages multiple
applications running simultaneously
• Most OS provides some level of protection against malicious or buggy code
• For programmers, the OS provides a programming interface that enables easy access to the
hardware and input/output devices
• It also manages system resources such as memory, storage and network
• The OS hides some complexity between consistent, well documented interfaces
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
An operating system (os) is a piece of software (a program) or a collection of different pieces of software that manages the resources in a computer and provides a convenient interface between application programs and the hardware. An operating system provides a level of abstraction between hardware and software. Computer: as a programmer, you do not need to know how hardware works, by calling a function in the os, you can send a message to another computer via the internet. Operating system core tasks: managing multiple processes running in parallel, a process is a program that is currently being executed, managing the memory that processes use, provides access to file systems, the network and other i/o resources. The core functionality of an os is provided by the operating system kernel, or kernel for short. Abstraction: main goals of an os is to make computers easier to use, for both end users and programmers.
