All In One Gsm Tool: Operating System Notes

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Saturday, 13 April 2019

Operating System Notes April 13, 2019

Single User Operating System and Multi User Operating System

Single User Operating System and Multi User Operating System - What is Single User Operating System and Multi User Operating System & Difference...

Single User Operating System and Multi User Operating System

Operating system is classified according to the following criteria's.

Single User Operating System
Multi User Operating System
Time Shared Operating System

Single User Operating System:

Single user operating system allows only one user to use the system for micro-computer a single user operating system offer the following function.

Initialization of system in which the operating system must have initial loader program to initialize the system properly.
File Management an operating system contains the file management programs that control the process of creation, deletion and access of files of data and the programs.
Memory Management in type of operating system, this memory management is simple, as only one application is executed at one time. If there is another application to be run the previous is remove from the memory.
Input Output management: I/O management in this type of operating system is more simple as compare to other because one I/O device is made active at a time.

Abdul Kabir 0

Wednesday, 10 April 2019

Operating System Notes April 10, 2019

What is Server Base and Desktop Operating Systems - Linux Operating System - Network Server

What is Server Base and Desktop Operating Systems - Windows Server - Linux Operating System - What is Desktop OS - What is Network Server...

Server Base and Desktop Operating Systems

Desktop/Stand-alone Operating Systems:

Desktop/Stand-alone Operating System are that operating systems which works on desktop or notebook computer are called desktop Operating System s. The example of standalone Operating System are DOS, windows 95, Windows NT workstation, Windows Me and Windows XP Home edition, Windows XP Professional edition, windows 2010, mac OS, OS/2 etc.

What is Server Base and Desktop Operating Systems

Some popular standalone/desktop Operating System are following:

1. DOS:

DOS stand for Disk Operating System. It was developed by Microsoft in early 1980 for personal computers. It is a single-user, single-tasking Operating System.

2. Windows 95, 98, Me:

In 1995 Microsoft introduce windows 95 Operating System, includes the feature of graphical user interface. windows 95 are multitasking, networking, multimedia, and many other capabilities Operating System. Microsoft introduced Windows 98 new version of windows 95 during 1998, Windows Me (millennium edition) in 2000.

3. Windows XP:

Windows XP(experience) is the one of the most popular product of Microsoft Corporation which is released in 2001. XP stand for experience. It is fastest and most reliable Operating System. Three versions of Windows XP are Home edition, professional, and Windows XP server.

4. MAC:

Macintosh Operating System is a product of Apple. It was one of the first successful GUI. It was released with Macintosh computer in 1984. Now the latest version of Macintosh operating system is called Mac OS X.

Server base/Network Operating System:

Server base/Network Operating System are those operating system which supports networks(client/server) is called network Operating System. It normally works on a server. Some examples of network operating system or Windows NT server, Windows 2000 server, Netware, Unix, Linux and Solaris.

Some popular Server base/Network operating system are following:

1. Netware:

Novell's Netware is network Operating System. It is designed for client/server network.

2. Windows NT Server:

Microsoft introduced its Windows NT (new technology) Operating System in 1995.

It is designed for client/server networks. The server of the network uses Windows NT (new technology) server. The client computer use Windows NT workstation.

3. Unix:

Unix is multitasking, Operating System. It was developed in early 1970 at Bell Laboratories. Many versions of this operating system are available. It uses command driven interface.

4. Linux:

Linux is free, multitasking and network Operating System. It was developed in 1991. There is Many versions of Linux are use command-line interface and some other GUI.

Abdul Kabir 0

Monday, 8 April 2019

Operating System Notes April 08, 2019

What is Multiprocessing and Multiprogramming Operating Systems - Difference Between Multiprocessing and Multiprogramming Operating System

Multiprocessing and Multiprogramming Operating System - What is Multiprocessing and Multiprogramming Operating Systems - Difference, Definition Details etc...

Multi-processing and Multi-programming Operating Systems

Multi-programming Operating System:

In simple batch operating system one badness that the processor often remains idle when the process under execution is halt due to some external event. And according to the processor input and output devices are also slow, therefore, most of the time the processor remains idle. To remove this badness, the concept of multi-programming operating system was introduced.

Multi-programming operating system is that type of operating systems which allows running of multiple computer programs simultaneously on a single processor. For example, you may be typing in MS Word, listening to music while in background Internet Explorer is downloading some pages from internet. Working in windows 7, windowsVista, windows XP and Linux environment is multi-programming.

In the multi-programming operating system, several programs are active at the same time in RAM of the computer. This means that more than one job is filled in RAM and executed by a single processor. Figure below shows main memory partitioned into five (05) frames holding four (04) jobs.

Main Memory (Ram)

Operating System

(Kernel)

Job 3

Job 2

Job 1

Job 0

Main Memory Partitioning in Multi-programming:

Abdul Kabir 0

Saturday, 6 April 2019

Operating System Notes April 06, 2019

Types of Operating System - Operating System Definition - OS

Types of Operating System - linux operating system - operating system definition - OS - Types of Operating System full explained notes...

Types of Operating System

Batch processing operating system:

Batch processing system is the type of operating system which collects jobs in batches before being processed by the CPU. A job is piece of work usually consisting of a program and the data to be Run. until start the processing by computer all the jobs are stored in job queues.

Once the CPU gets ready and fetches a job from the job queue, then there is no interaction of the user with the computer to interrupt the processing of the job until its completion.

Batches of jobs are formed by collecting jobs during working hours and then executed during the evening time or at the end of each day or whenever the computer is available. Once a batch job is beginning, it running until it is completed or error. The example of batch processing operating system is IBM's OS 360.

Multi-tasking operating system:

Multitasking is the process in which the operating system performs multiple tasks simultaneously on a single processor in such a way that creates the impression of parallel executions. practically, all modern OS has the ability of multitasking.

Multitasking does not mean that the Computer has multiple processes to execute multiple processes simultaneously. it means that the operating system switches the jobs so quickly on a single processor that the user thinks all these processes are executed in parallel.

Multitasking can be either preemptive or Cooperative. In preemptive version, the operating system divide the CPU time and allocates one slot to each of the programs. Operating systems that support preemptive multitasking are: Solaris, Unix, Windows 2000, windows XP, MacOS X and LINUX. operating system that support cooperative multitasking is windows 3.x.

Real Time operating system:

Real time operating systems are those operating system which give quick response to users requests without delaying them. Unlike batch processing operating systems, real time operating systems reduce immediate response to users request as they are input to the system. Real Time operating system success rate is not only measured incorrectness terms of logically computed result, but also on the basis of time at which the results are produced. As these systems process the user input immediately, therefore, the systems support high degree of interactivity as a result they can be widely used in critical environments, such as, airplane ways control systems and air base system etc.

As the results of real time operating systems are time-based, therefore they are grouped into hard-real time operating systems and soft-real time operating systems. Hard-real time operating system is performing the solution in the specified time constraint with guarantee; otherwise, the results are catastrophic such as flight navigation, automobile, and spacecraft systems.

Features of real time operating system:

A real time operating system guarantees a solution or results within a specific time.
These are multitasking Operating systems.
These operating systems are used for the execution of real-time applications, such as weather forecasting, geographical information retrieval, controlling machinery, scientific instruments and industrial systems etc.
These systems are aimed on quick and predictable response to events.
When these systems start execution of a task, they do not provide full control to the user to interact are interface in that processing.