Operating System - MADE EASY Study Material for GATE, ESE and SES Exams

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I/O System

Objectives of I/O system: Take an application I/O request and send it to the physical device. Take whatever response comes

Each page table entry has a valid bit, it indicates whether the corresponding page is currently in memory. If the

Paging is static memory allocation technique that permits the physical address space of a process to be non contiguous. The

The concept of a logical address space that is bound to a separate physical address space is central to proper

A deadlock is a deadlock condition in a system where a process cannot proceed because it needs to obtain a

CPU scheduler schedules a process which is loaded in memory (Ready state) to run in CPU. Types of Scheduling Algorithm

A thread is a light weight process. Here light weight means the instructions and context (attributes) will be lesser than

System call provides the services of operating system to the user programs via Application Program Interface (API). It provides an

A processor can support two modes of execution: Kernel / Protected / Supervisor / System/Monitor / Privileged mode. User mode

It is a program that acts as an interface between a user (applications) and the computer hardware. TYPES OF OPERATING