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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
Unix process API The two most important function calls to use when programming with several processes are fork and exec: fork() creates a copy of current process. It gives
Write a note on multithreading. Multithreading is the capability of an operating system to execute different parts of a program called as threads, at the same time. The program
Q. When a process creates a fresh process using the fork() operation which of the following state is shared among the parent process and the child process? 1 Stack 2 Heap
What are the drawbacks of contiguous allocation of disk space? The disadvantages are a. Suffers from internal fragmentation b. Suffers from external fragmentation c. F
Q. Explain about diffrent Process State? Process State When process executes, it changes its state. Process state is defined as the current activity of the process. Fi
Explain about file allocation methods? The main problem in direct-access nature is how to assign space to these files so that disk space if utilized effectively and files can b
Q. Describe why SSTF scheduling tends to favour middle cylinders over the innermost and outermost cylinders. Answer: The middle of the disk is the location having the smalles
Explain the Request or Response interface The Request/Response interface is ideal for a message based client-server interaction. By modeling components to interact via a reque
Q. Error detection in operating system? Error detection- Error detection take places at both the hardware and software levels. At the hardware level every data transfers must b
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