Shri Ram Swaroop Memorial College of Engineering & Management

virtual memory fcfs process state process in memory process concept i/o system structure i/o buffering scan sstf file access file attributes file operation file concept demand paging segmentation paging lru otimal fifo address and address space cache memory memory hierarchy design fragmentation multiprog with fixed partition resident monitor bare machine recovery from deadlock deadlock detection deadlock avoidance deadlock prevention handling deadlocks deadlock characterization system model round robin priority sjfs algorithm evaluation thread scheduling scheduling algorithms scheduling criteria process control block (pcb) process transition diagram type of semaphore characteristic of semaphore semaphore ipc-schemes ipc- models inter process communication principle of concurrency ystem components os services modules micro kernal layered structure monolithic structure simple structure multithreaded systems multiuser systems multiprocessing/multiprocessor multitasking multiprogramming system real time distributed time sharing interactive batch disadvantage of os advantage of os feature of operating system function of operating system computer-system organization operating system definition what operating systems do computer-system architecture operating system