Operating System Tutorial

Operating System Tutorial Types of Operating System Evolution of Operating System Functions of Operating System Operating System Properties Operating System Services Components of Operating System Needs of the Operating System

Operating Systems

Linux Operating System Unix Operating System Ubuntu Operating System Chrome Operating Systems Fedora Operating System MAC Operating System MS Windows Operating System Solaris Operating System Cooperative Operating System CorelDRAW Operating System CentOS FreeBSD Operating Systems Batch Operating System MS-DOS Operating System Commercial Mobile Operating Systems


Difference Between Multi-programming and Multitasking Difference between C-LOOK and C-SCAN Difference between Rotational Latency and Disk Assess Time Trap vs Interrupt Difference between C-SCAN and SSTF Difference between SCAN and FCFS Difference between Seek Time and Disk Access Time Difference between SSTF and LOOK Difference between Process and Program in the Operating System Difference between Protection and Security in Operating System

How To

How to implement Monitors using Semaphores How to Install a Different Operating System on a PC


What is Kernel and Types of Kernel What is DOS Operating System What is Thread and Types of Thread What is Process Scheduler and Process Queue What is Context Switching What is CPU Scheduling What is Producer-Consumer Problem What is Semaphore in Operating System Monitors in Operating System What is Deadlock What is Paging and Segmentation What is Demand Paging What is Virtual Memory What is a Long term Scheduler What is Page Replacement in Operating System What is BSR Mode What is Convoy Effect What is Job Sequencing in Operating System Why is it critical for the Scheduler to distinguish between I/O-bound and CPU-bound programs Why is there a Need for an Operating System


Process Management Process State Scheduling Algorithm FCFS (First-come-First-Serve) Scheduling SJF (Shortest Job First) Scheduling Round-Robin CPU Scheduling Priority Based Scheduling HRRN (Highest Response Ratio Next) Scheduling Process Synchronization Lock Variable Mechanism TSL Mechanism Turn Variable Mechanism Interested Variable Mechanism Deadlock Avoidance Strategies for Handling Deadlock Deadlock Prevention Deadlock Detection and Recovery Resource Allocation Graph Banker’s Algorithm in Operating System Fixed Partitioning and Dynamic Partitioning Partitioning Algorithms Disk Scheduling Algorithms FCFS and SSTF Disk Scheduling Algorithm SCAN and C-SCAN Disk Scheduling Algorithm Look and C-Look Disk Scheduling Algorithm File in Operating System File Access Methods in Operating System File Allocation Method Directory Structure in Operating System N-Step-SCAN Disk Scheduling Feedback Queue in Operating System Contiguous Memory Allocation in Operating System Real-time Operating System Starvation in Operating System Thrashing in Operating System 5 Goals of Operating System Advantages of Operating System Advantages of UNIX Operating System Bit Vector in Operating System Booting Process in Operating System Can a Computer Run Without the Operating System Dining Philosophers Problem in Operating System Free Space Management in Operating System Inter Process Communication in Operating System Swapping in Operating System Memory Management in Operating System Multiprogramming Operating System Multitasking Operating Systems Multi-user Operating Systems Non-Contiguous Memory Allocation in Operating System Page Table in Operating System Process Scheduling in Operating System Segmentation in Operating System Simple Structure in Operating System Single-User Operating System Two Phase Locking Protocol Advantages and Disadvantages of Operating System Arithmetic operations in binary number system Assemblers in the operating system Bakery Algorithm in Operating System Benefits of Ubuntu Operating System CPU Scheduling Criteria in Operating System Critical Section in Operating System Device Management in Operating System Linux Scheduler in Operating System Long Term Scheduler in Operating System Mutex in Operating System Operating System Failure Peterson's Solution in Operating System Privileged and Non-Privileged Instructions in Operating System Swapping in Operating System Types of Operating System Zombie and Orphan Process in Operating System 62-bit operating system Advantages and Disadvantages of Batch Operating System Boot Block and Bad Block in Operating System Contiguous and Non - Contiguous Memory Allocation in Operating System Control and Distribution Systems in Operations Management Control Program in Operating System Convergent Technologies in Operating System Convoy Effect in Operating System Copy Operating Systems to SSD Core Components of Operating System Core of UNIX Operating System Correct Value to return to the Operating System Corrupted Operating System Cos is Smart Card Operating System Cosmos Operating Systems Examples Generation of Operating System Hardware Solution in Operating System Process Control Block in Operating System Function of Kernel in Operating System Operating System Layers History of Debian Operating Systems Branches and Architecture of Debian Operating Systems Features and Packages of Debian Operating Systems Installation of Operating System on a New PC Organizational Structure and Development in Debian Operating Systems User Interface in Operating System Types Of Memory in OS Operating System in Nokia Multilevel Paging in OS Memory Mapping Techniques in OS Memory Layout of a Process in Operating System Hardware Protection in Operating System Functions of File Management in Operating System Core of Linux Operating System Cache Replacement Policy in Operating System Cache Line and Cache Size in Operating System What is Memory Mapping? Difference Between Network Operating System And Distributed Operating System What is the difference between a Hard link and a Soft Link? Principles of Preemptive Scheduling Process Scheduling Algorithms What is NOS? What is the Interrupt I/O Process? What is Time Sharing OS What is process termination? What is Time-Sharing Operating System What is Batch File File system manipulation What is Message-passing Technique in OS Logical Clock in Distributed System

Functions of Operating System

The functions of Operating System are:

  1. Process Management
  2. Memory Management
  3. File Management
  4. Device Management
  5. Secondary storage Management
  6. Security
  7. Coordination between other software and users
  8. Networking
  9. Job Accounting
  10. Error detecting aids
Functions of the Operating System

1. Process Management

Process Management support operating system to create and delete processes. Process management also offers a mechanism for synchronization and communication among processes.

An operating system performs the following activities for process management:

  • The operating system maintains the track of the processor and the status of a process. The software which performs this task is referred to as a traffic controller.
  • It assigns the processor to the process.
  • It also performs the task of the de-allocated processor, if a process is no longer needed for the processor.

2. Memory Management

Memory Management is used to manage Primary memory as well as secondary memory. The memory management module performs the allocation job and de-allocation of memory to the program.

The operating system performs various activities for memory management are:

  • It keeps track of memory means which part of the memory is in use, and what part of the memory is not in use.
  • Operating system helps to allocate the memory at the time when the process request for memory.
  • If process no longer needs memory, then de-allocates the memory.
  • In multiprogramming, the task of memory allocation to the processes is done with the help of Operating System.

3. File Management

For fast or simple navigation and easy usage file system is organized into directories. These directories consist of directories and other files. It helps to handle all the file-related tasks like organization storage, retrieval, sharing, naming and files protection. It preserves track of information, location, status, user, etc.

4. Device Management

Operating System performs the task of allocations and de-allocations of the devices. It helps to keeps the track of all the devices. With the help of Operating system, device communication via their respective drivers is performed. It manages the device in an effective manner.

5. Secondary Storage Management

Operating System is responsible for secondary storage management. The System has various levels of storage that consist of primary storage, secondary storage, and cache storage. The set of instruction and data are stored in primary memory or cache memory so that the program which is running can reference it.

6. Security

The Operating system is responsible for security means the operating system prevents the data and information from unauthorized access and threats.

7. Coordination between other software and user

The operating system also performs the task of coordination between other software and users. OS directs as well as allocates assemblers, interpreters, compilers, and other software to different computer system users.

8. Networking

A distributed system means a bunch of processors which do not share memory hardware devices and clock. With the help of the network, the processor communicates with each other.

9. Job accounting

Operating system performs the function of job accounting by keeping the track of time and resource used by several jobs and users.

10. Error detecting aids

The operating system also performs the task of error detection. It continuously monitors the system to find or detect errors and prevents the system from the error.