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Several schemes available are as follows:
Pipes: One-way communication process through which different process can interact. The problem is that the two processes could have a unique ancestor. However this problem was fixed with the help of named-pipes (FIFO).
Message Queues : Message queues may be used between unrelated and related processes executing on a machine.
Shared Memory: This is the fastest of all IPC process. The memory to be shared is examined into the address space of the processes. The speed gain is attributed to the fact that there is no kernel use. But this scheme requires synchronization.
Thermostats are subjected to rigorous testing before they are shipped to air conditioning technicians around the world. Results from the last five samples are shown in the table. D
explain goals of system software
What is Directory? The device directory or simply called as directory records information-such as name, location, size, and type for all files on that certain partition. The d
Central to implementation of a modern memory management system is the page replacement algorithm. Modern virtual memory systems break memory up into pages and map (via a page table
Q. What is the purpose of system calls? Answer: System calls permit user-level processes to request services of the operating system.
Can a direct access file be read sequentially? Explain. Yes. Keep a counter, cp, initially set to 0. After reading record cp, increment cp.
LOOK o Like SCAN except stops moving inwards (or outwards) when no more requests in that direction exist. C-SCAN (circular scan) o Moves inwards servicing requests u
Transparency Users must be able to access remote resources as though these resources were local. Transparency should as well promote user mobility. Users must be allowed
Multithreading - Operating systems that permit different parts of a software program to run concurrently. Operating systems that would come into this category are: Linux UNI
What is a Real-time system? A Real-time system is used when inflexible time requirements have placed on the operation of processor or the flow of data so it is often used as a
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