Computer Fundamentals

7

OPERATING SYSTEM

Contents

• Objectives of OS
• Types of OS—Single user and single task, single user and multitasking, multiuser, multiprocessing, real time, embedded OS
• Functions of OS—Process management, memory management, file management, device management, protection and security, user interface
• Process management
  • Process—Process states (new, ready, running, waiting, terminated)
  • CPU scheduling—Scheduler, scheduling algorithms (FCFS, SJF, RR)
  • Process synchronization—Concurrent processes, race condition
  • Deadlock—Deadlock conditions, deadlock prevention, deadlock avoidance
• Memory management
  • Memory allocation—Multiple partition allocation, paging
  • Virtual memory—Demand paging
• File management—Files, directory structure
• Device management—Device ...