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

Simple Structure in Operating System

An operating system is a piece of software that lets the user applications talk to the hardware of the system. Because it is such a complicated structure, the operating system should be made with the utmost care to make it easy to use and modify. Partially developing the operating system is a simple approach. With distinct inputs, outputs, and functions, each of these components ought to have clear definitions.

Because an operating system has a complicated structure, we need a structure that is clearly defined to help us applying it to our particular needs. It is simpler to design an operating system in parts than it is to break down a large problem into smaller, simpler sub problems. Additionally, each section is a part of the Operating System. An operating system structure is the method of connecting and integrating multiple operating system components into the kernel. Operating systems are implemented using a variety of different kinds of structures.

Numerous operating systems have a relatively straightforward structure. These started out as small systems and quickly grew much larger than their scope allowed. MS-DOS is a well-known example of this. It was made specifically for a small group of people. It didn't look like it would become so popular.

Simple Structure

It is the simplest and least well-defined structure of an operating system. It is only suitable for limited-sized systems. The interfaces and levels of functionality are well separated in this structure; As a result, programs are able to access I/O routines, which can lead to unauthorized access to I/O routines.

These operating systems are small, straightforward, and limited systems with no clearly defined structure. The connection points and levels of use are not very much isolated. An illustration of such an operating system is MS-DOS. The fundamental I/O routines can be accessed by application programs in MS-DOS. If one of the user applications fails, these kinds of operating systems cause the system as a whole to crash.

In contrast to MS-DOS, modular operating systems are preferable. As a result, you'd have more control over the computer and all of its applications. The measured construction would likewise permit the software engineers to conceal data as required and execute internal routines as they see fit without changing the external details.

The MS-DOS operating system is used to implement this structure:

  • There are many layers to the MS-DOS operating system, each with its own set of features.
  • These are the layers:
    • MS-DOS device drivers
    • System Program
    • Application Program
    • ROM BIOS device drivers
  • Layering gives the MS-DOS operating system an advantage because each level can be defined independently and can interact with each other when necessary.
  • If the system is constructed in layers, designing, maintaining, and updating it will be simpler. Therefore, Simple Structure makes it simple to build limited systems of lower complexity.
  • The entire operating system crashes in the event of a user program failure.
  • Because MS-DOS systems have a low abstraction level, programs and I/O routines are visible to the user, allowing for unauthorized access.

Advantages and Disadvantages of Simple Structure in OS


  • Because there are only a few interfaces between the application program and the hardware, it provides better application performance.
  • It is simple for kernel programmers to create such an operating system.


  • The entire operating system fails if just one user application fails.
  • Because the layers are connected and communicate with each other, there is no data hiding or abstraction.
  • The Operating System's processes can be accessed by layers, which can result in data modification and a system crash.