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Operating System

Operating system is defined as a software program that runs on the system and manages all software and hardware resources of computer. It acts as an interface between the user and computer.

OS is a key component of system software in a system. Nowadays, various OS are available to the users such as Linux, Mac, Windows, etc. OS deals with the several topics viz. process control, Linux forks, Inter process communication, virtual memory, paging, segmentation, Page replacement Algorithms, Scheduling Algorithms, Asynchronous concurrent processes, Concurrent programming, and many more.

It recognises input from the keyboard, sends output to the system’s screen and keep track of files and directories on the disk by controlling peripheral devices. Its structure consists of system components, system services, system calls and system programs.

There are different types of Operating System given as:

  • Batch Operating System: the user of batch OS prepared the job on off-line devices because user’ do not communicate with the system directly.
  • Network Operating System: it runs on the server and enables the server to manage the various functions of networking, such as data, applications, security, etc.
  • Time Sharing Operating System: It is also known as Multi user Operating System as it permits multiple users to access a computer system at different terminals.
  • Real time Operating System: it has fixed time constrain and requires minimum interval time to process and respond to an input. It is of two types, including Soft real-time systems and hard real-time systems.

OS covers the interconnection between computer and its devices. It provides a software platform to run the application programs, with OS help programs can run on the system. User can run the application program on any OS but it must be written to run. Two main views of Operating System are User view and System view. Some of the core topics of OS are as follows:

  • Problems on Deadlock: deadlock is a situation where all the processes get stuck in a loop and nothing can be done.
  • Semaphore: it is the most important concept of OS which is used for sharing the access to files and to share a common memory space
  • Files and Database Systems: file systems is a part of OS which is used to keep the track of files in computer system whereas database system not usually a part of OS, it only provides the access to information in a database.

OS performs the various operations to develop the applications:

  • In multitasking OS, OS determines the order and time to run the applications.
  • OS manages the sharing of internal memory between the various applications.
  • It sends the messages about the status of operation to each application and user.
  • It manages the division of programs on systems that provides parallel processing, so the program can run on the multiple processor in one time.

Scheduling algorithm is the one of the major concept of OS which is responsible for the CPU time allocation to the process and threads. These algorithms can be preemptive or non preemptive. Main objective of this algorithm is to allocate the CPU time to all tasks. Scheduling algorithm is of six types:

  • First-Come, First-Server Scheduling
  • Shortest-Job-Next Scheduling
  • Priority Scheduling
  • Multiple-Level Queues Scheduling
  • Shortest Remaining Time
  • Round Robin Scheduling

Nowadays, Security is the most important concern of the systems software. Security is mainly concerned with assigning a security system to the resources of computer such as memory, software programs, CPU, information. A computer can be damaged or its data can be lost, if an unauthorized user runs a program on it. We can provide the security to computer systems in following ways:

  • Authentication
  • One time passwords
  • Program threats protection software
  • System threats protection software

Distributed Operating System serves the multiple real time applications by using multiple central processors and is an extension of the Network OS. It supports the integration of machines and higher level communication on the network. Some of the most known e.g. of Distributed Operating System are IRIX operating system, Mach OS, DYNIX OS, Solaris OS, AIX OS, etc. it provides the several advantages:

  • Communication
  • Reliability
  • Speed up Computation
  • Resource sharing

Moreover, Virtual Memory Management in OS is responsible for maintaining the copy of the memory on secondary storage for all programs. Paged memory management used the Virtual Memory to provide the demand paging. Some of the pages for a process only reside in the virtual memory. Total number of page faults is responsible for the Performance of Virtual Memory Management. This page faults depends on:

  • Frame allocation algorithm
  • Page replacement algorithm

In today’s world, OS is an important subject that students study in their academic field. If you are worried about OS assignments, let us know and feel free. Our experts provide the assignment help for students all over the world. You can take the assignment help from our assignment experts on various important topics of OS, such as Kernel architectures, Threads, Race detection, Programming and code execution with spawned processes, and on many other topics.

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  • System structures
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Operating systems have a large number of responsibilities and powers while working within larger systems. It provides a software platform on which programs run ,known as application programs. Operating systems can be
classified on different basis. On the basis of its usage, we have different OS for different systems. Smoe of the Computer OS are Windows, DOS, Linux etc. while mobile OS are android, ios etc.
Its primary goal is to make computer work conveniently and fast. It is used to allocate resources to processes. On the basis of this, operating systems are classified as :

  • Multi-user Operating System
  • Simple Batch System
  • Multiprocessor System
  • Multiprogramming Batch System
  • Distributed Operating System
  • Realtime Operating System
  • Multitasking Operating System
  • Multithreading

Related topics for OS online help:

  • PC Hardware and x86 Programming, Segmentation and Paging, Interrupts and System Calls, xv6 process operations,Threads and
  • Synchronization,Locks,Semaphores and Monitors, Concurrency Errors, Scheduling, Advanced Scheduling,Dynamic Memory Allocation ,
  • Virtual Memory, Disks, RAID, File Systems,xv6 File and Disk Systems,File System Examples, Linux File Systems and Journaling,Storage System Errors

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Operating Systems

  • Processor management
  • Storage management
  • Concurrency control
  • Multi-programming
  • Processing
  • Device drivers
  • Operating system components
  • Modeling and performance measurement
  • Protection and security
  • Operating system structure
  • Function, structure
  • Implementation
  • Particular emphasis on multiprogramming
  • Concurrent programming
  • Virtual memory
  • Scheduling policies for cpu
  • Secondary storage, deadlocks
  • File systems
  • scheduling and resource management
  • I/O, and security issues
  • operating systems
  • Process management
  • memory management
  • auxiliary storage management
  • resource allocation
  • Operating system design
  • construction techniques
  • Concurrent programming
  • operating system kernels
  • correctnessdeadlock
  • protection
  • transaction processing
  • design methodologies

Get instant help for Operating Systems Reports & Case studies.

  • computer operating systems design , implementation, I/O programming, concurrent processes , synchronization problems, process management , scheduling of processes, virtual memory management, device management, file systems, deadlock problems, system calls, interprocess communication, Algorithms, Computer Organization, analysis of multiprogramming systems, virtual memory, computer system performance, queuing theory, synchronization of parallel programs , algorithms for mutual exclusion, definitions
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Operating system structure
UNIX vs Windows
Process creation
Process death
Process Control Blocks
Process scheduling
Concurrency control
Memory management
Device management
Bootstrapping an OS
UNIX source code
Compiling and debugging the system
Implementation of modules
Performance analysis modules

Operating systems design and implementation
Basic structure
Synchronization and communication mechanisms
Implementation of processes, process management, scheduling, and protection
Memory organization and management, including virtual memory
I/O device management, secondary storage, and file systems


Topics for Operating Systems

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