Notes for Operating Systems - OS by Verified Writer

Introduction, Evolution of Operating Systems, Types of operating systems, Operating System Structures, Hardware, software structures needed for an operating system,

Process Management, Processes, States Life cycle of process, Schedulers, Context Switching,

Process scheduling policies, Preemptive vs Nonpreemptive, CPU scheduling algorithms

Threads States Life cycle of thread, thread scheduling, Types of threads Examples

Inter process Communication IPC Mechanisms,Concurrent processes, Process synchronization, Critical Section, Peterson s Solution, Classic IPC Problems, Semaphores, Concurrent programming, Monitors

Deadlock, Basic cause of deadlock, Conditions for deadlock, resource allocation graph, Wait for graph, Strategies for handling deadlocks, Starvation, Havender s linear ordering principle, deadlock r navoidance detection, Safe state, Dijikstra s Banker s Algorithm

Memory Management, Main Memory, Static Dynamic Partition schemes, multiple partitions schemes, Fragmentation, Compaction, Buddy Systems, Partition selection algorithms, de-allocation strategy, Swapping, Contiguous Memory Allocation,, Paging, Structure of the Page Table, Segmentation

Virtual Memory, Demand Paging, Copy on Write, Page Replacement Policies, Belady s Anomaly, Thrashing, , Working set model