Operating System (OS), 2025-2026
Shiv Nadar University, Chennai, India, Section-Cyber

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 Programing 10 July, Thursday, 2025 PPT
3 Single-Processor Systems, Multiprocessor Systems, Clustered Systems, Multiprogramming and Multitasking, Operating-System Operations 14 July, Monday, 2025 Galvin Ch1.
4 Multiprogramming and Multitasking, Operating-System Operationsicon 15 July, Tuesday, 2025
5 Unix Basic Commands 17 July, Thursday, 2025 PPT
6 System Calls, System Services, Linkers and Loaders 17 July, Thursday, 2025 Galvin Ch2.
7 Process, Thread, Process Scheduling 21 July, Monday, 2025 Galvin Ch3.
8 Context Switch, Operations of Process 22 July, Tuesday, 2025 PPT Zombie, Orphan
9 Using the Shell & Meta Characters 24 July, Thursday, 2025 PPT
10 Process Creation (fork) & Wait 24 July, Thursday, 2025 PPT Sample Codes
11 Process Creation (fork) & Wait cont.. 28 July, Monday, 2025
12 Process Creation (fork) & Wait cont.. 29 July, Tuesday, 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 04 August, Monday, 2025 PPT Sample Codes
16 Multicore Programming: Programming Challenges, Amdahl’s Law, Types of Parallelism, Multithreading Models 05 August, Tuesday, 2025 Galvin Ch4.
17 Inspect Zombie and Orphan process, wait, waitpid and exec (from slide 48) 07 August, Thursday, 2025 PPT
18 Thread Issues 07 August, Thursday, 2025 PPT
19 CPU Scheduling 11 August, Monday, 2025 PPT Galvin Ch5.
20 Scheduling Criteria, Scheduling algorithm, FCFS, SJF 12 August, Tuesday, 2025 Galvin Ch5.
21 Round Robin Scheduling 14 August, Thursday, 2025 Galvin Ch5.
22 Child & Parent Process with wait 14 August, Thursday, 2025 PPT
22a Holiday for Independence Day 15 August, Friday, 2025
23 Priority Scheduling, Multilevel Queue Scheduling 18 August, Monday, 2025 Galvin Ch5.
24 Priority Scheduling, Multilevel Queue Schedulingicon 19 August, Tuesday, 2025 Galvin Ch5.
25 Multilevel Feedback Queue Scheduling 21 August, Thursday, 2025 Galvin Ch5.
26 POSIX Thread 21 August, Thursday, 2025 PPT
27 Multi Processor Scheduling 25 August, Monday, 2025 PPT Galvin Ch5.
28 Realtime Shceduling 26 August, Tuesday, 2025 PPT Galvin Ch5.
29 Realtime Shceduling (Cont.) 28 August, Thursday, 2025
30 Unix IO 28 August, 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. 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 Validato: 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

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