CSCA0101 Computing Basics
1
CSCA0101
COMPUTING BASICS
Chapter 6
Operating Systems
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Operating Systems in Computing Basics, Study notes of Operating Systems
The major functions and types of operating systems, as well as user interfaces. It covers real-time, distributed, and embedded operating systems, as well as command-line interfaces. likely to be useful as study notes or a summary for a course on operating systems or computing basics.
Typology: Study notes
2021/2022
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CSCA
COMPUTING BASICS
Chapter 6
Operating Systems
Operating Systems
- Operating Systems
- Major Functions
- User Interface
- Examples of Operating System
Operating Systems
Operating Systems
Operating Systems
Operating Systems
Operating Systems
Types of Operating System
Real-Time
- A real-time operating system is a multitasking operating system that aims at executing real-time applications.
- Responds to input instantly.
Operating Systems
Types of Operating System
Multi-user vs. Single user
A multi-user operating system allows multiple users to access a computer system concurrently.
Time-sharing system can be classified as multi-user systems as they enable a multiple user access to a computer through the sharing of time.
Single-user operating systems, as opposed to a multi-user operating system, are usable by a single user at a time.
Operating Systems
Types of Operating System
Distributed
A distributed operating system manages a group of independent computers and makes them appear to be a single computer.
The development of networked computers that could be linked and communicate with each other, gave rise to distributed computing.
Operating Systems
Types of Operating System
Embedded
Embedded operating systems are designed to be used in embedded computer systems.
They are designed to operate on small machines like PDAs with less autonomy.
They are able to operate with a limited number of resources.
Operating Systems
Major Functions of Operating System
Resource Management
- The resource management function of an OS allocates computer resources such as CPU time, main memory, secondary storage, and input and output devices for use.
Operating Systems
Major Functions of Operating System
Data Management
- The data management functions of an OS govern the input and output of data and their location, storage, and retrieval.
- It also is responsible for storing and retrieving information on disk drives and for the organization of that information on the drive.
Operating Systems
Major Functions of Operating System
Standard Means of Communication between User
and Computer
- The OS also establishes a standard means of communication between users and their computer systems.
- It does this by providing a user interface and a standard set of commands that control the hardware.
Operating Systems
User Interface
- A program that controls a display for the user (usually on a computer monitor) and that allows the user to interact with the system).
- The user interface allows the user to communicate with the operating system.
Operating Systems
Types of User Interface
- Command line interface
- Graphical user interface
Operating Systems
Types of User Interface
Command Line Interface (CLI)
- A command-line interface is a mechanism for interacting with a computer operating system or software by typing commands to perform specific tasks.
- This method of instructing a computer to perform a given task is referred to as "entering" a command.
- Accept input via keyboard only.
- Not suitable for beginners.