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Write a short note about process.
Unceremoniously, a process is a program in implementation. A process is too much than the program code, which is occasionally known as the text section. It is as well includes the current activity, as signifies by the value of the program counter and the contents of the processor's registers. Additionally a process generally includes the process stack which contains temporary data as well as a data section which contains global variables.
A program by itself isn't a process a program is a passive entity, for example the contents of a file stored in a disk, while a process is an active entity, with a program counter identifying the next instruction to execute and a set of associated resource.
Linked list allocation: At this time the blocks are stored using linked lists. The block size require not be the same. Thus internal fragmentation is avoided. Consider
Q. a number of systems automatically delete all user files when a user logs off or a job terminates unless the user explicitly requests that they be kept other systems keep all fil
The term thread-safe in computer programming describes that routine or portion of the program that may be called from multiple programming threads without uncalled for interactions
What is the use of multiprogramming on individual processors ? In the usual multiprocessor, which is dealing with independent or coarse-grained synchronization granularity, it i
Define spooling. A spool is a buffer that holds output for a device, like printer, that cannot accept interleaved data streams. When a request finishes printing, the spooling s
What is process control block? Every process is represented in the OS by a process control block. It has many pieces of information associated with an exact process.
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FCFS (First Come, First Served) Perform operations in order requested No reordering of work queue No starvation every demand is serviced Poor performance
Define the difference between preemptive and nonpreemptive scheduling. State why strict nonpreemptive scheduling is unlikely to be used in a computer center. Preemptive schedul
Give an overview of UNIX based file systems. UNIX and UNIX-like operating systems allocate a device name to each device, other than this isn't how the files on that device are
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