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Write a short note on disk scheduling
One of the responsibities of operating system O/S is to use the hardware efficiently. Whenever a process requires I/O to or from the disc it issues a system call to the operating system. The request state severer pieces of information:
If the disk controller and drive are available the request can be serviced immediately. If the controller or drive is busy any new request for service will be placed on the queue of pending request for that drive. For a multiprogramming system with several processes the disk queue may often have several pending requests. Therefore when request is accomplish the operating system chooses which pending request to service next.
Worst Fit Algorithm Here we obtain the largest space available for the smallest. Therefore after that process entered there will be much more space remaining. In this space we
what is unbounded buffer
Additional Reference bits algorithm Here we keep an 8-bit byte for every page in memory. At standard intervals the reference bit is shifted by the OS. If a shift register conta
How can the deadlock be prevented Bankers algorithm : The Resource allocation graph algorithm isn't applicable to a resource allocation system with multiple instances of every
What is the purpose of the command interpreter? Why is it usually separate from the kernel? It reads commands from the user or from a file of commands and executes them, usuall
The 5Z Company is selling pens to the local market. It is planning to maximize sales and profit by analyzing few conditions using the break-even analysis formula. Below is the data
what is it all about? why do we need? what are the types of backup? how is it done in unix?
List out the advantages of windows 2000 file management. Permits detailed security for individual folders and files. Built-in granular compression capabilities
mariz
Q. What are the five main activities of an operating system in regard to process management? Answer: a. The creation as well as deletion of both user and system processes
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