Operating Systems

unit 1 introducing operating systems introduction - what is operating system-operating system software -a brief History of machine hardware -types of Operating systems -brief History of Operating system development-object-oriented design. Br>unit 2 memory management early systems: Single-user contiguous Scheme -fixed partitions-dynamic partitionsbest-fit versus first-fit allocation -deallocation - relocatable dynamic partitions. Virtual memory: paged memory allocation-demand paging-page replacement policies and concepts -segmented memory allocation-segmented/demand paged memory allocation - virtual memory-cache memory. Br>unit 3 processor management overview-about multi-core technologies-job scheduling versus process schedulingprocess scheduler-process scheduling policies-process scheduling algorithms -a word about interrupts-deadlock-seven cases of Deadlock -conditions for deadlockmodeling deadlock-strategies for handling Deadlocks –starvationconcurrent processes: what is parallel processing-evolution of multiprocessorsintroduction to multi-core processors-typical multiprocessing configurations-processs synchronization software. Br>unit 4 device management types of devices-sequential access storage media-direct access storage devicesmagnetic disk drive access times- components of the I/br>o subsystemcommunication among devices-management of I/br>o requests. Br>unit 5 file management The file manager -interacting with the file manager -file organization - physical storage allocation -access methods-levels in a file management system - access control verification br>Module.