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Q. What are the major differences between operating systems for mainframe computers and personal computers?
Answer: In general operating systems for batch systems have simpler requirements than for personal computers. Batch systems don't have to be concerned with interacting with a user as much as a personal computer. Consequently an operating system for a PC must be concerned with response time for an interactive user. Batch systems don't have such requirements. A pure batch system as well may have not to handle time sharing whereas an operating system must switch rapidly between different jobs.
Briefly explain the process management in UNIX. UNIX makes use of the easy but powerful process facility that is visible to the user. UNIX follows the model in which the majori
Explain the general structure of a typical process? There are basically four main sections through which each of the process has to pass through.The universal algorithm is:-
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
The performance of a file system depends upon the cache hit rate (fraction of blocks found in the cache). If it takes 1 msec to satisfy a request from the cache, but 40 msec to sat
For reading, most operating systems use demand paging. This means that pages are only read from the disk into physical memory when they are needed. In the page table, there is a re
What are the four necessary conditions of deadlock prevention? Ans: Four essential conditions for deadlock prevention: a. The meaning of removing the mutual exclusio
diffenciet between least recently used and not recently used
Define deadlock prevention. Deadlock prevention is a set of process for ensuring that at least one of the four essential conditions like mutual exclusion, hold and wait, no pr
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
list the prevention of mechanism for race condition with operating system
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