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Concept of Reentrancy
It is a useful, memory-saving method for multiprogrammed timesharing machines. A Reentrant method is one in which multiple clients can share a single copy of a program during the similar period. Reentrancy has 2 key functions: The program code cannot change itself, and the local data for each client process must be stored in different disk. Thus, the permanent phase is the code, and the temporary phase is the pointer back to the calling function and local variables needed by that code. Each operation instance is known as activation. It runs the code in the permanent phase, but has its permanent copy of local parameters or variables. The temporary phase associated with each activity is the activation record. usually, the activation record is store on the stack.
Q. Discuss the advantages as well as disadvantages of caching name translations for computers located in remote domains. Answer: There is a performance benefit to caching nam
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Here are the conditions necessary for a deadlock to occur; note that all of them are necessary, and none is suf?cient: 1. ?nite resources: the resources are held in a mutually-e
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Most process abstractions support processes being destroyed when the program terminates, or in response to a specific kill directive. There are two common implementations, one a "p
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What are the disadvantages of swapping technique used in pre-3BSD UNIX systems? If there is excessively much memory contention, processes are swapped out until sufficient
Explain Deadlock Every process in a set of processes is waiting for an event which only a process in the set can cause.
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