System Call in OS
We use system calls to provide an interface between a process and OS. A system call helps a program request services from the kernel. It is a programmatic method and the only entry point...
Operating System Tutorials
Components of Operating System
An operating system is a large and complex system created by combining small pieces. These pieces are well-defined parts of a system that have carefully defined inputs, outputs, and functions. Though most OSs differ...
Semaphores in Operating System
Integer variables that help solve the critical section problem are known as semaphores. Wait and signal are the two atomic operations that help achieve process synchronization in a multiprocessing environment.. If an argument, let’s...
Linux Operating System
Linux, a popular version of the UNIX Operating System, is an open-source OS because its source code is freely available i.e., it is free to use. It is compatible with UNIX and has similar...
Operating System Security
Security is the feature of an Operating System that ensures the integrity, confidentiality, and availability of a system and its resources, especially the data and information. Security provides a protection system in case an...
OS File System
We can define a file as a named collection of related information recorded on secondary storage. Some secondary storage devices are magnetic disks, magnetic tapes and optical disks. A file is a combination of...
Operating System I/O Software
I/O Software helps the user interact with I/O hardware. Independence is a key concept of I/O software. It means that a program should be able to access an I/O device without specifying the device...
Operating System I/O Hardware
A computer system operates on multiple devices. An important service provided by an OS is I/O management. Some common I/O devices are mouse, keyboard, touchpad, USB devices, Bit-mapped screen, LED, On/off switch, network connections,...
Virtual Memory in Operating System
Apart from the physically installed memory, a computer also has some extra memory that is known as virtual memory. It is a storage scheme that allows the secondary memory to be addressed as a...
Memory Management in Operating System
In this tutorial, we will learn memory management in Operating systems and various ways for the same. Let’s start!! What is Memory management in Operating System. Memory management is a function of the OS....
