Subject Details
Dept     : CSE
Sem      : 4
Regul    : R2023
Faculty : Vinodhini B
phone  : NIL
E-mail  : vinodhni.b.cse@snsct.org
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Lecture Notes

UNIT 1:
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Introduction, Computer System Organization
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Architecture, Operations
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Process Management – Memory Management
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Storage Management ,Operating System
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Process concept ,Process scheduling
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Operations on processes, Cooperating processes
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Inter process communication
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Threads: Multi-threading Models
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Threading issues.
UNIT 2:
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CPU Scheduling: Scheduling criteria, Scheduling algorithms-FCFS
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Multiple-processor scheduling – Real time scheduling, Algorithm Evaluation
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Process Synchronization: The critical-section problem
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Synchronization hardware – Semaphores
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Classical problems of synchronization
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Deadlock avoidance
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Deadlock detection- Recovery from deadlock
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Deadlock: System model – Deadlock characterization
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Methods for handling deadlocks – Deadlock prevention
UNIT 3:
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Memory Management: Background , Swapping
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Contiguous memory allocation
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Paging
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Segmentation
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Segmentation with paging
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Virtual Memory: Background, Demand paging
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Allocation of frames ,Thrashing
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Allocation of frames ,Thrashing
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Page replacement-FIFO Page Replacement ,Optimal Page Replacement
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Page replacement-LRU Page Replacement, LRU Approximation Page Replacement
UNIT 4:
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Introduction-File concept
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Access methods
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Directory structure
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Files System Mounting, File Sharing Protection.
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File System Implementation
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Directory implementation
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Allocation methods
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Free-space management.
UNIT 5:
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Streams, Performance.
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I/O Systems, I/O Hardware
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Application I/O interface ,Kernel I/O subsystem
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Mass-Storage Structure, Disk scheduling
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RAID
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Disk management – Swap-space management