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Define deadlock avoidance.
An alternative method for avoiding deadlocks is to need additional information about how resources are to be requested. Every request requires the system consider the resources currently available, the resources currently allocated to every process, and the future requests and releases of every process, to decide whether they could be satisfied or must wait to avoid a possible future deadlock
Write a note on the usage of semaphores. Semaphore is a synchronization tool and it is a variable having integer values. It is accessed only by two standard atomic operations w
Memory Protection
What do you mean by system calls? System calls give the interface among a process and the operating system. When a system call is implemented, it is treated as by the hardware
Define a loader that is executed when a system is first turned on or restarted? Bootstrap loader is executed when a system is first turned on or restarted
how are the window activate
Explain Swapping Swapping is a method of temporarily removing inactive programs from the memory of computer system.
Problem: a) Define the term ‘process' and what are the different constituents of a process. b) In the three-state process model, what does each of the three states signify?
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,
Locks (also known as mutexes, short for mutual exclusion locks) provide mutual exclusion to shared data inside a critical session. They are implemented by means of two atomic routi
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
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