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Operating System Concepts: Process Management Study Guide

This guide covers core operating system concepts related to process management. It delves into the distinction between programs and processes, the internal structure of a process (memory segments, PCB), and the states a process can be in. Understanding these concepts is crucial for comprehending multitasking, resource allocation, and concurrency in modern computing.

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OS Fundamentals

Introduction to Operating Systems

Understanding the fundamental role of an OS as an interface between hardware and users.

Evolution of OS History

Studying the progression of operating systems from the 1990s through 2000 and beyond.

Distributed Computing

Exploring systems where components located on networked computers communicate and coordinate actions.

Parallel Computation

Learning how multiple computations are performed simultaneously to increase speed and efficiency.

Process Management

Process Concepts and Definitions

Defining what a process is and how it differs from a program.

  • Program
  • Process
  • Passive entity
  • Active entity
  • Executable code
  • Static data

Process States and Life Cycle

Understanding the various states a process moves through from creation to termination.

  • Process lifecycle
  • Process states
  • New
  • Ready
  • Running
  • Waiting
  • Terminated

Process Control Block (PCB)

Analyzing the data structure used by the OS to store all information about a process.

  • Process Control Block
  • PCB
  • Process state
  • Program counter
  • CPU registers
  • Scheduling information
  • Memory management
  • I/O status

Context Switching

Learning the mechanism of saving and restoring the state of a CPU so that execution can be resumed from the same point.

  • Context switch
  • CPU state
  • Process interruption

Process Operations: Suspend and Resume

Studying how processes are temporarily halted and brought back to an active state.

  • Suspend process
  • Resume process
  • Process control

Inter-Process Communication

Interrupt Processing

Understanding how the hardware and software handle signals that require immediate attention.

Interrupt Classes

Classifying different types of interrupts (hardware vs software, maskable vs non-maskable).

Signals

Learning how the OS uses signals to notify a process of a specific event.

Message Passing

Studying the mechanism where processes communicate by exchanging messages.

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