overview of os, Operating System

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Optimal replacement policy, The optimal replacement policy, called OPT, is ...

The optimal replacement policy, called OPT, is to evict the page which will be accessed farthest into the future. Since we can't predict the future precisely, we can't implement OP

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Long term scheduling Scheduling explicitly performed when a new process is created and it determines which programs are admitted to the system for processing. Therefore it cont

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Explain the Statements Present in Assembly Language An assembly program consists of subsequent three types of statements: a. Imperative statements: this point out an action

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What are the requirements for solution of critical section problems? Mutual exclusion : If process p is implementing in its critical section then no other processes can be exe

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Q. Researchers have recommended that instead of having an access list associated with each file (specifying which users can access the file and how) we should have a user control

What is super block, What is super block A partition control block have...

What is super block A partition control block have partitions details, such as the number of blocks in the partition, size of the blocks, free-blocks and free-block pointers an

Define the dosexit function used in the os/2, Define the DosExit Function u...

Define the DosExit Function used in the OS/2 DosExit(action, resultCode)  DosExit function is to be called when a thread or process is finished executing. If EXIT_THREAD is

Long term scheduler, Long term scheduler calculates which processes are a...

Long term scheduler calculates which processes are admitted to the machine for processing. It accepts the degree of multiprogramming. Once accepted, a job converts a process.

What is direct memory access, Direct memory access Many computers avoid...

Direct memory access Many computers avoid burdening the main CPU with programmed I/O by offloading sine if this work to a special-purpose processor known as a direct memory add

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