AD-405 RGPV B.Tech
Operating Systems (OS)
Previous year papers and the official syllabus are free to read, no account needed.
Previous Year Papers
4 papers, latest Jun 2025
Syllabus, notes and important questions for AD-405
Syllabus units
Topics as the official RGPV syllabus lists them.
Unit 1 Introduction to Operating Systems 6 topics
- Function
- Evolution
- Desirable Characteristics and features of an O/S
- Operating Systems Services: Types of Services
- Different ways of providing these Services – Utility Programs
- System Calls
Unit 2 Process Management 20 topics
- Concept of a process
- Process State Diagram
- Process based kernel
- Dual mode of process execution
- CPU scheduling algorithms
- deterministic modeling
- System calls for Process Management
- Concept of Threads: User level & Kernel level Threads
- Process Management in UNIX & Windows
- Inter Process Communication: Real and Virtual Concurrency
- Mutual Exclusion
- Synchronization
- Critical Section Problem
- Solution to Critical Section Problem: Semaphores and their Operations and their implementation
- Deadlocks: Deadlock Problems
- Characterization
- Prevention
- Avoidance
- Recovery
- IPC in UNIX & Windows
Unit 3 Memory Management 11 topics
- Different Memory Management Techniques – Partitioning
- Swapping
- Segmentation
- Paging
- Paged Segmentation
- Comparison of these techniques
- Techniques for supporting the execution of large programs: Overlay
- Dynamic Linking and Loading
- Virtual Memory – Concept
- Implementation by Demand Paging etc.
- Memory management in UNIX & Windows
Unit 4 File Systems Management 13 topics
- File Concept
- User’s and System Programmer’s view of File System
- Disk Organization
- Tape Organization
- Different Modules of a File System
- Disk Space Allocation Methods – Contiguous
- Linked
- Indexed
- Directory Structures
- File Protection
- System Calls for File Management
- Disk Scheduling Algorithms
- File Systems in UNIX & Windows
Unit 5 Input / Output Management 11 topics
- Principles and Programming
- Input/Output Problems
- Different I/O operations: Program Controlled
- Interrupt Driven
- Concurrent I/O
- Asynchronous Operations
- Logical structure of I/O function
- I/O Buffering
- Kernel I/O Subsystem
- Introduction to Network, Distributed and Multiprocessor Operating Systems
- I/O management in UNIX & Windows
Exam insights
Counted from 4 past AD-405 papers.
Marks asked per paper, by unit
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Unit 1 Introduction to Operating Systems 15 marks
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Unit 2 Process Management 43 marks
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Unit 3 Memory Management 14 marks
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Unit 4 File Systems Management 21 marks
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Unit 5 Input / Output Management 16 marks
Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.
Asked again and again
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Calculate the number of page faults for the given reference string and frames using FIFO, LRU and/or Optimal page replacement and compare them.
Asked 4 times: 2025, 2023, 2020, 2019
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Write short notes on Time-sharing (and Batch processing) operating systems
Asked 3 times: 2023, 2020
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Explain what a process is (including difference from program and overview of process management) and explain the process life cycle / process states with the process state transition diagram.
Asked 3 times: 2026, 2025, 2023