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Q. What is the use of system calls? Answer: System calls permit user-level processes to request services of the operating system.
What are the various file operations? The six basic file operations are Creating a file Reading a file Writing a file Repositioning within a file Tr
Explain system-wide open-file and per-process open-file The system-wide open-file table have a copy of the FCB of each open file, as well as other information. The per-pr
Process States A total of nine states are acknowledged by the UNIX system. They are like as follow: User running Executing
Q. What system calls have to be implementing by a command interpreter or shell in order to start a new process? Answer: In the UNIX systems a fork system call followed by an ex
how does it works
What do you mean by first fit? First fit allocates the first hole that is big sufficient .Searching can either start at the starting of the set of holes or where the previous f
Parent and Child process communicate in unix A child and parent can interact through any of the normal inter-process communication schemes (pipes, message queues, sockets, s
Which are the different states of a process? Different status of a process is: New: When the process is created. Running: When instructions are executed. Wait
basic advantage of using interrupt initiated data transfer over transfer under program control without an interrupt
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