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Define System Call
A system call is a request that is made by any program to the operating system for carrying out tasks - picked from a predefined set - which the said program does not have needed authorizations to execute in its own flow of execution. System calls offer the interface among a process and the operating system. Several operations interacting with the system need permissions not available to a user level process, for example I/O performed with a device present on the system or any form of communication with other processes needs the use of system calls.
time-stamping It is a method proposed by Lamport, used to sequencing events in a distributed machine without the use of clocks. This process is intended to order events consis
Now, let us discuss two related algorithms for deciding which pages to evict. The clock algorithm is one of the most popular choices. It works by keeping frames in a circular struc
Basic concepts When a process is to be changed in, the pager guesses which pages will be used before the process is changed out again. Instead of swapping in a entire process,
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What are the requirements to be satisfied by the critical section problem? Following are the necessities to be satisfied by the critical section problem: a) Mutual exc
Producer-Consumer Problem Using Semaphores The Solution to producer-consumer problem use three semaphores namely- full, empty and mutex. The semaphore 'full' is utilized for
Explain what ISAM is. Indexed sequential access method. The file is stored in sorted order. ISAM has a master index file, indicating in what part of another index file the key
What is the benefits OS co-operating process? Information sharing. Computation speeds up. Modularity. Convenience.
explain in detail about ipc in linux
Explain Rehashing to Handle Collision Rehashing: Re-hashing schemes make use of a second hashing operation while there is a collision. If there is an additional collision, we
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