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Objectives & Functions, OS as a User Computer Interface, OS as a Recourse Manager, Evolution of OS, Resident Monitor, Simple Batch System, Multi programmed Batch System, Time Sharing Systems, Windows NT overview

Process- Process States - Two State Process, Model & Queuing diagram, Process Creation & termination, Five state Process Model, Suspended process- Multi block Queues, Reasons for process Suspension, Process description- Process and Resources, Operating System control Structure, Process Control Block, Process list Structure- Process Image, Function of OS kernel, Buffer Management

Parallel Processing, Control Structure for Parallelism, Mutual Exclusion, Critical Section, Dekker’s, Monitors

Introduction (Examples), Indefinite postponement, Resource Concepts, Four necessary Conditions, Major Research areas, Dead Lock - prevention, Avoidance ((Bout ears Algorithm), Detection, Recovery

Storage Organization, Management, Storage Management Strategies, Single User contiguous storage allocation, Overlaying Structure, Memory Protection, Fixed partition Multiprogramming, Memory Relocation, Variable partition Multiprogramming, Memory fragmentation- Coalescing Holes, Memory Compaction (De fragmentation), Memory placement, Strategies, Memory Swapping, (Virtual Storage), Paying - Address Translation Relative to Logical, Logical to Physical, Segmentation- Address transaction Relative to Logical- Logical to Physical, Page Size- Fetch policy, Placement policy, Replacement policy

Types of Scheduling, Queuing diagram for Scheduling, Short term Scheduling Criteria, Scheduling Algorithm, Short term Scheduling policies, FCFS - SJF - SRT- HRRN -RR- Multiple feed back Queues, Problems Related with different policies

Files- Files Management Systems - File System Architecture, File Organization and Access methods, Pile file - Sequential file- Indexed Sequential file Indexes file, Direct file- file directory- Information Elements Tree Structure- file Sharing Accessing rights, Simultaneous Access- Record blocking - Secondary Storage management - Reallocation VS Dynamic allocations, Portion Size- File allocation methods (Contiguous- chained Indexed), FAT- Free space management Problems.

Distributed Operating Systems, The OSI Architecture OSI layers, Servers Message, passing Distributed Mutual Exclusion, Distributed Dead Lock

Overview, The nature of threads, Security Techniques - procedural guards, Operating, System facilities, Encryption