JNTUK R20 2-1 Operating Systems Material/Notes PDF Download


JNTUK R20 2-1 Operating Systems Material/Notes PDF Download

Students those who are studying JNTUK R20 CSE Branch, Can Download Unit wise R20 2-1 Operating Systems (OS) Material/Notes PDFs below.


JNTUK R20 2-1 Operating Systems Material/Notes PDF Download


  • Introduce to the internal operation of modern operating systems
  • Define, explain, processes and threads, mutual exclusion, CPU scheduling, deadlock, memory management, and file systems
  • Understand File Systems in Operating System like UNIX/Linux and Windows
  • Understand Input Output Management and use of Device Driver and Secondary Storage (Disk) Mechanism
  • Analyze Security and Protection Mechanism in Operating System

  • New Materials Updated.


Operating Systems Overview: Operating system functions, Operating system structure, Operating systems operations, Computing environments, Open-Source Operating Systems. System Structures: Operating System Services, User and Operating-System Interface, systems calls, Types of System Calls, system programs, operating system structure, operating system debugging, System Boot.

Download UNIT-1 Material PDF | Reference-2 | Ref-3


Process Concept: Process scheduling, Operations on processes, Inter-process communication, Communication in client server systems.

Multithreaded Programming: Multithreading models, Thread libraries, Threading issues.

Process Scheduling: Basic concepts, Scheduling criteria, Scheduling algorithms, Multiple processor scheduling, Thread scheduling.

Inter-process Communication: Race conditions, Critical Regions, Mutual exclusion with busy waiting, Sleep and wakeup, Semaphores, Mutexes, Monitors, Message passing, Barriers, Classical IPC Problems – Dining philosophers problem, Readers and writers problem.

Download UNIT-2 Material PDF | Reference-2


Memory-Management Strategies: Introduction, Swapping, Contiguous memory allocation, Paging, Segmentation.

Virtual Memory Management: Introduction, Demand paging, Copy on-write, Page replacement, Frame allocation, Thrashing, Memory-mapped files, Kernel memory allocation.

Download UNIT-3 Material PDF | Reference-2


Deadlocks: Resources, Conditions for resource deadlocks, Ostrich algorithm, Deadlock detection and recovery, Deadlock avoidance, Deadlock prevention.

File Systems: Files, Directories, File system implementation, management and optimization. Secondary-Storage Structure: Overview of disk structure, and attachment, Disk scheduling, RAID structure, Stable storage implementation.

Download UNIT-4 Material PDF | Reference-2


System Protection: Goals of protection, Principles and domain of protection, Access matrix, Access control, Revocation of access rights.

System Security: Introduction, Program threats, System and network threats, Cryptography for security, User authentication, Implementing security defenses, Firewalling to protect systems and networks, Computer security classification. Case Studies: Linux, Microsoft Windows.

Download UNIT-5 Material PDF | Reference-2


  1. Silberschatz A, Galvin P B, and Gagne G, Operating System Concepts, 9th edition, Wiley, 2013.
  2. Tanenbaum A S, Modern Operating Systems, 3rd edition, Pearson Education, 2008. (for Interprocess Communication and File systems.)


  1. Dhamdhere D M, Operating Systems A Concept Based Approach, 3rd edition, Tata McGraw-Hill, 2012.
  2. Stallings W, Operating Systems -Internals and Design Principles, 6th edition, Pearson Education, 2009
  3. Nutt G, Operating Systems, 3rd edition, Pearson Education, 2004.




  • Describe various generations of Operating System and functions of Operating System
  • Describe the concept of program, process and thread and analyze various CPU Scheduling Algorithms and compare their performance
  • Solve Inter Process Communication problems using Mathematical Equations by various methods
  • Compare various Memory Management Schemes especially paging and Segmentation in Operating System and apply various Page Replacement Techniques
  • Outline File Systems in Operating System like UNIX/Linux and Windows

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