Cache memory

      We have present  about the types of cache memory and its description.
      First, we want to tell you the meaning of cache memory and the explanation of cache memory.
 

   
         Then, first group have present about demand paging of cache memory which is in operating
         system  demand paging (as opposed to anticipatory paging) is a method of virtual             memory management. In a system that uses demand paging, the operating system copies a disk page into physical memory only if an attempt is made to access it and that page is not already in memory (i.e., if a page fault occurs). It follows that a process begins execution with none of its pages in physical memory, and many page faults will occur until most of a process's working set of pages is located in physical memory.  

     

Chapter 3 : Memory Management

              

            

1.       Memory  management is done by memory manager..
2.      Main tasks are to :

          ☺ keeping track of which parts of memory are in used and which parts are not in use.

          ☺ allocating memory to processes when they need it and dellocate it when they are done.
          ☺ manage swapping between main memory and disk when main memory  is too small to hold

               all the processes.

Multitasking

      TERMINOLOGIES IN RELATION TO OPERATING SYSTEM
     
     In computing, multitasking is a method by which multiple tasks, also known as                   processes resources such as a CPU. With a multitasking OS, such as windows XP, we           can simultaneously run multiple applications.

We have discussed about the  multitasking have 3 types of multitasking that we have used in operating system.

First, Preemptive Multitasking is involved the use of an interrupt mechanisms. This multitasking is invoked a scheduler to determine which process should execute next. Therefore, all the processes will get some amount of CPU time at any given time.

We have identified that Cooperative Multitasking would be the second type of multitasking, it's called cooperative because all program must cooperative for it to work.

Based on our discussion in class, in computer architecture , multithreading is the ability of a CPU or a single core in a multi-core processor to execute multiple processes or threads concurrently, appropriately supported by the operating system

The basic concept of Operating System (chapter 2)

During class time, we were asked to make a discussion on chapter 2 of subject of operating system . This chapter is about the basic concept of operating system which the systems used to manipulated with the user interface.

"If the application is usually command driven, the shell might be a menu-driven system that translates the user's selections into the appropriates commands "

👀 WHAT IS MENU-DRIVEN SYSTEM ?
       WHAT HAVE YOU UNDERSTAND ABOUT THIS SYSTEM ?

  
* the user interacts with the computer by selecting options from a menu.
💭  The systems which use a menu driven interface :

• wordwise word processor 
• a bank cash point machine 
• grass database

👀  WHAT IS GUI ?
       

* GUI is stand for Graphical User Interface which is  presented (displayed) on the computer screen. It is the result of processed user input and usually the main interface for human-machine interaction. The touch user interfaces popular on small mobile devices are an overlay of the visual output to the visual input.

👀  WHAT IS NETWORK OPERATING SYSTEM ?

This network operating system not related to network system as we have thought before. We have make a discussion about this system , this system is designed primarily to support workstation, personal computer and in a some instances , older terminal that are connected on a local area network (LAN)

A network operating system has to have the following features :

• Deal with users logging on
• Maintain the network connection to the server
• Expand the file system to view folders on other computers
• Provide security to separate user accounts from each other

Source and System Call

Here i would like to share the source for operating system and system calls .
Let's we started on the source. There are 2 types of sources for operating system that we have learnt.

1) Closed source
* the source code is held by the developer
* Microsoft Windows and Apple os x

2)  Open source
* the source code is available to the end user
* ex : Ubuntu Linux , Google's chrome and Android system

🙆🙈 the video would tell you the difference between open source and closed source...have you enjoy it.

SYSTEM  CALL 
*  provide the interface between a process and the operating system.
*these calls are generally available  as assembly language instruction and are usually listed in the manuals used by assembly language programmers.

Watch this video the learn more about system call.

We have learnt about the various types of operating system that we have manipulated and applied in our life. There are 3 various types of operating system which is Batch Operating System , Multiprogramming  Operating System  and Distributed Operating System.

1) Batch Operating System
* same type of jobs batch (a set of jobs with similar needs) together and execute a time.
* computer operators can delay or prioritize different batches easily, depending on circumstances.
* always resident in memory.

2) Multiprogramming Operating System
*CPU will never be idle and keeps on processing.
* It maximizes the total job throughput of a computer
* Better reliability if a processor breakdown then other takes its worked

3) Distributed Operating System
* a distributed may have more total computing power than a mainframe
* always ready to communicate with other systems
* if one machine crashes, the system as a whole can still survive

Note : You can find out more about these types of operating system at openbookproject.net/courses/intro2ict/system/os_intro.html

Introduction

Hello guys 😆
Welcome to my blog 🐦. Here I would like to introduce about a subject for electronic students especially for polytechnic students which has a code of DEC6103. This subject is called operating system.

WHAT DOES THE OPERATING SYSTEM MEANS ? 😧😱

🌝👉👉 hahahaha....

Okay....let it started 🌚

Operating system is   system software that manages computer hardware and software resources and provides common services for computer programs.