CS3451 Introduction to Operating Systems (OS)

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     S.Santhosh (Admin) 
Important questions 
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based on views next exams questions are yet to be updated
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same qns given as last time bcoz these are very finite questiosn choosen by me .so no neeed tochange the question in this list read all given and get good marks

unit:1
1. design implementation**
2. evolution of OS
3. OS structure and operations**
unit-2
1. process(components,)**
2. Thread(libraries) and SMP Management**
3. Process Synchronization 
 4. Critical Section Problem
5/ Scheduling (types, diff)**
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unit-3
1.Contiguous Memory Allocation, Segmentation**
2.page Replacement ( full topic and related sums algorithms )**
3.Copy on write
4. thrashing 
 unit-4
1.disk management,scheduling (disk strorage allocation,performance)FCFS,SSTF,SCAN (DISK SCHEDULING
2. sums related to disk queue with respect to I/O
3.stream driver and stream module
Unit-5 
1.types of VM 
3. iOS and andriod

2.virtualization and  OS components 

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**Very important questions are bolded and may be asked based on this topic

PART-C

1.Compulsory Questions {a case study where the student will have to read and analyse the subject }
mostly asked from unit 2, 5(OR) a situation given and you have to answer on your own

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Contact uS for more updates *These questions are expected for the exams This may or may not be asked for exams
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SYllabuS
UNIT I INTRODUCTION
Computer System - Elements and organization; Operating System Overview - Objectives and Functions
- Evolution of Operating System; Operating System Structures – Operating System Services - User
Operating System Interface - System Calls – System Programs - Design and Implementation -
Structuring methods.
UNIT II PROCESS MANAGEMENT
Processes - Process Concept - Process Scheduling - Operations on Processes - Inter-process
Communication; CPU Scheduling - Scheduling criteria - Scheduling algorithms: Threads - Multithread
Models – Threading issues; Process Synchronization - The Critical-Section problem - Synchronization
hardware – Semaphores – Mutex - Classical problems of synchronization - Monitors; Deadlock -
Methods for handling deadlocks, Deadlock prevention, Deadlock avoidance, Deadlock detection,
Recovery from deadlock.
UNIT III MEMORY MANAGEMENT
Main Memory - Swapping - Contiguous Memory Allocation – Paging - Structure of the Page Table - Segmentation, Segmentation with paging; Virtual Memory - Demand Paging – Copy on Write - Page Replacement - Allocation of Frames –Thrashing.
UNIT IV STORAGE MANAGEMENT
Mass Storage system – Disk Structure - Disk Scheduling and Management; File-System Interface - File
concept - Access methods - Directory Structure - Directory organization - File system mounting - File
Sharing and Protection; File System Implementation - File System Structure - Directory implementation
- Allocation Methods - Free Space Management; I/O Systems – I/O Hardware, Application I/O interface,
Kernel I/O subsystem.
UNIT V VIRTUAL MACHINES AND MOBILE OS
Virtual Machines – History, Benefits and Features, Building Blocks, Types of Virtual Machines and their
Implementations, Virtualization and Operating-System Components; Mobile OS - iOS and Android.

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