Operating System (OS), 2025-2026
Shiv Nadar University, Chennai, India, Section-AI-DS-A

OSs were no longer just for engineers—they became intuitive and widely accessible. The story of the OS is a story of evolution — from machines that needed exact commands to smart systems that run everything from supercomputers to smartphones.
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Lec No. Topic Materials
1 Introduction to Operating System 10 July, Thursday, 2025 PPT Syllabus
2 Introduction to Unix System Programming 10 July, Thursday, 2025 PPT
3 Single-Processor Systems, Multiprocessor Systems, Clustered Systems, Multiprogramming and Multitasking 11 July, Friday, 2025 Galvin Ch1.
4 Operating-System Operations, Dual-Mode and Multimode Operation 14 July, Monday, 2025 Galvin Ch1.
5 System Calls, System Services, Linkers and Loaders 17 July, Thursday, 2025 Galvin Ch2.
6 Unix Basic Commands 17 July, Thursday, 2025 PPT
7 Process, Thread, Process Scheduling 18 July, Friday, 2025 Galvin Ch3.
8 Context Switch, Operations of Process 21 July, Monday, 2025 PPT Zombie, Orphan
9 Process Creation (fork) & Wait 24 July, Thursday, 2025 PPT Sample Codes
10 Using the Shell & Meta Characters 24 July, Thursday, 2025 PPT
11 Process Creation (fork) & Wait cont.. 25 July, Friday, 2025
12 Process Creation (fork) & Wait cont.. 28 July, Monday, 2025
13 Introduction to Thread 31 July, Thursday, 2025 PPT Sample Codes
14 Process, fork (upto slide 47) 31 July, Thursday, 2025 PPT
15 Thread and Process on local and shared Variables 01 August, Friday, 2025 PPT Sample Codes
16 Multicore Programming: Programming Challenges, Amdahl’s Law, Types of Parallelism, Multithreading Models 04 August, Monday, 2025 Galvin Ch4.
17 Thread Issues 07 August, Thursday, 2025 PPT
18 Inspect Zombie and Orphan process, wait, waitpid and exec (from slide 48) 07 August, Thursday, 2025 PPT
19 CPU Scheduling 08 August, Friday, 2025 PPT Galvin Ch5.
20 Scheduling Criteria, Scheduling algorithm, FCFS, SJF 11 August, Monday, 2025 Galvin Ch5.
21 Round Robin Scheduling 14 August, Thursday, 2025 Galvin Ch5.
22 Child & Parent Process with wait 14 August, Thursday, 2025 PPT
23 Priority Scheduling, Multilevel Queue Scheduling 18 August, Monday, 2025 Galvin Ch5.
24 Priority Scheduling, Multilevel Queue Schedulingicon 21 August, Thursday, 2025 Galvin Ch5.
25 POSIX Thread 21 August, Thursday, 2025 PPT
26 Multilevel Feedback Queue Scheduling 22 August, Friday, 2025 Galvin Ch5.
27 Multi Processor Scheduling 25 August, Monday, 2025 PPT Galvin Ch5.
28 Realtime Scheduling 28 August, Thursday, 2025 PPT Galvin Ch5.
29 Unix IO 28 August, Thursday, 2025 PPT dup2 example
30 Realtime Scheduling (Cont.) 29 August, Friday, 2025
31 Synchronization tools: Critical Section, Peterson Solution, Hardware Support for Synchronization, Mutex 04 September, Thursday, 2025 PPT Galvin Ch6.
32 Practice Program with mutex 04 September, Thursday, 2025 PPT
33 Hardware Support for Synchronization, Mutex 05 September, Friday, 2025 Galvin Ch6.
34 More About Mutex 18 September, Thursday, 2025 PPT
35 Practice Program with mutex & Dead lock 18 September, Thursday, 2025 PPT
36 Semaphore 19 September, Friday, 2025 PPT
37 Dining Philospher Problem 22 September, Monday, 2025 PPT
38f Class Rearranged for Puja Holidays 06 October, Monday, 2025
38 Semaphore Example Program 25 September, Thursday, 2025
39 Critical Section & Semaphore 25 September, Thursday, 2025 PPT Sample Codes
40 Deadlocks: System model - Deadlock characterization 09 October, Thursday, 2025 Galvin Ch8.
41 Investigate 3 programs dead_lock.c, live_lock1.c and live_lock2.c 09 October, Thursday, 2025 PPT
42 Mid Sem Answer Script discussion and Distribution 10 October, Friday, 2025
43 Deadlock Prevention, Avoidance & Recover 13 October, Monday, 2025 PPT
44 Monitor & Dining Philospher Problem (Extra Class for 06-10-2025) 15 October, Wednesday, 2025 PPT
45 Inter Process Communication 16 October, Thursday, 2025 PPT
46 Posix IPC 16 October, Thursday, 2025 PPT
Reference Books of OS2025-2026
Silberschatz, A., Galvin, P. B., & Gagne, G. (2023). Operating system concepts (10th ed.). Wiley.
Kay A. Robbins, & Steve Robbins, UnixTM Systems Programming, Communications, concurrency, and Treads, Pearson Education
Assignments OS2025-2026
1 Basic Unix command and Shell: Please download the PDF and follow the instructions carefully. Open a fresh terminal. All commands used in Parts A, B, C and D, along with their outputs, must be pasted on the website or included in a PDF and uploaded to the LMS, depending on your instructor's instructions.
Published on : 2025-07-24, Last date of submission : 2025-07-24
2 Multithreaded Sudoku Solution Validator: Design a multithreaded application to validate a completed 9×9 Sudoku puzzle. Each row, column, and 3×3 subgrid must contain the digits 1 through 9 exactly once. Thread Strategy: (i) 1 thread checks all rows (ii)1 thread checks all columns (iii)9 threads check each 3×3 subgrid Use a 2D array to represent the Sudoku grid. Please find the attachments for more details
Published on : 2025-08-07, Last date of submission : 2025-08-07
3 multiprocess and therad on digital signature: In this task, you will create a text file containing your registration number, generate an RSA 2048-bit key pair, and sign the file with SHA-256 using your private key. The signature will be converted to Base64 format. You will also write a C program that uses process creation (fork + exec) and thread creation (pthread_create) to process the generated signature file (e.g., counting vowels in file.sig.b64). This exercise combines cryptography concepts with concurrent programming in Linux. Please find the attachment for further details.
Published on : 2025-08-14, Last date of submission : 2025-08-14
4 Thread-safe Shared Counter and File Logger using Mutexes: In this assignment, you will build a multithreaded C program that demonstrates how mutexes (mutual exclusion locks) prevent race conditions when multiple threads access shared data or resources. You will implement a shared counter updated by several worker threads and a common log file to which each thread writes its progress. You will run the program with and without mutex protection to observe the difference.
Published on : 2025-09-18, Last date of submission : 2025-09-18

Comments

  • Please correct midsem papers leniently. Thank you

  • You told there will be no codes just outputs of the code for midsem.but majority of questions writing code.so please correct midsem papers leniently.Thankyou

  • Anyone here know how to remove ur comment? I acc

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