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Define semaphore
A semaphore is a protected abstract or variable data type that constitutes the classic method for restricting access to shared resources like shared memory in a parallel programming environment.
SCAN o Go from the outside to the inside servicing requests and after that back from the outside to the inside servicing requests. o Replicate this over and over. o Diminish
Q. What is the occupation of the object manager? Answer: Substance present a generic set of kernel mode interfaces to user mode programs. Objects are influenced by the execut
What are the five major activities of an operating system in regard to file management? The creation and deletion of files The creation and deletion of directories The s
Write a XML with database with book details (BOOK ID, Title, Author, subject, publisher year, language, vendor, and price)
What is preallocation? Why do it? Allocating space for a file before making the file to allow for expansion. This reserves space for a certain file so that other files can't gr
Removing System Dependencies Because portions of the client - server application program may execute on different machines, it is very important for the developer to remove the
What are the necessary conditions for deadlocks? 1. Mutual exclusion : Only one process at a time is able to use the resource. 2. Hold and wait : A process should be holdi
what is multilevel page table and its applications?
50 peripharal device name ,diagram and uses
what is it all about? why do we need? what are the types of backup? how is it done in unix?
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