Operating Systems: Overview

What is Operating Systems

large and complex software system which manages all of the hardware resources of a computer and makes it easy to use

Functions of OS

- User interface

- Memory management

- Interrupt service routines

- Processor scheduling

- Backing store management

- I/O management

What is APIs

A collection where Applications interact with the operating system.

They define a set of commonly required functions (and associated parameters) that the operating system components can perform.

Where is user interaction usually done through in the OS

a graphical user interface or through a text based command-line interface.

Examples of Operating Systems

MAC OSX

Windows 10

Linux

Unix

IOS

Android

What is a Cloud Operating System

type of software platform that manages and controls cloud resources, such as servers, storage, networks, and applications, in a cloud computing environment.It provides a unified interface.

Examples of Cloud Operating System

Google Chrome OS

Amazon Web Services (AWS)

Apache CloudStack

What does the kernel do?

- loads/unloads apps from memory

- schedules tasks to run efficiently on CPU

- memory management

- file management

transfers data between memory

What is Kernel

a software component responsible for managing various low level features of the computer, e.g interfacing with hardware devices, allocating memory to individual programs, allocating CPU time to individual programs, and enabling programs to interact with each other.

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