By Naresh Chauhan
Divided into 8 elements, the ebook attempts to supply a complete assurance of subject matters, starting with OS architectures after which relocating directly to method scheduling, inter-process communique and synchronization, deadlocks, and multi-threading. below the half on reminiscence administration, uncomplicated reminiscence administration and digital reminiscence are mentioned. those are by way of chapters on dossier administration and I/O administration. safeguard and defense of working structures also are mentioned intimately. additional, complex OSs equivalent to allotted, multi-processor, real-time, cellular, and multimedia OSs are offered. Android OS, being essentially the most renowned, is mentioned lower than cellular working structures.
The final a part of the e-book discusses shell programming, in an effort to aid scholars practice the lab experiments for this path. the 1st six elements include case reports on UNIX, Solaris, Linux, and Windows.
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Additional info for Principles of operating systems
Virtualization of disk space. iv) The operating system implements virtual devices out of the physical devices because it is cumbersome to work with physical devices and virtual devices prepare a simple interface instead. In this way, virtual machine or extended machine (in the form of virtual processors, virtual memory, and virtual devices) is created from the physical computer. On a single physical machine, multiple virtual computers are created in the form of multiple processes (see Fig. 13).
Since the modern OSs are interrupt driven, the interrupt mechanism has been explained. The protection among the user jobs and the OS is a major issue to implement the multi-programming-based concepts in OSs. Therefore, it is necessary to understand how the protection has been achieved in the hardware. The management of I/O devices is a major area where the OS plays a great role. All the fundamental issues related to I/O devices such as type of devices, device controllers, and the device drivers have also been discussed.
These contacts are in turn wired to a microchip underneath the pad. The microchip can be a memory-only chip or a microprocessor chip containing memory and a CPU. Memory cards are used mostly as telephone cards, whereas microprocessor cards can be used for multiple applications on the same card. Although both cards can have stored value and stored data areas, the microprocessor card can in addition process the data since it contains a CPU, RAM, and an operating system in read only memory (ROM). Contact-less cards not only have an embedded microprocessor chip, but also contain a miniature radio transceiver and antenna.
Principles of operating systems by Naresh Chauhan