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Define FIFO Page Replacement Algorithm
This policy simply eliminates pages in the order they arrived in the main memory. By using this policy we simply remove a page based upon the time of its arrival in the memory. For instance if we comprise the reference string that is: 1, 2, 3, 4, 1, 2, 5, 1, 2, 3, 4, 5 and 3 frames (3 pages can be in memory at a time per process) after that we have 9 page faults as shown
What advantages are there to this two-level directory? Users are isolated from each other. Users have more freedom in choosing file names.
Problem 1: (a) The grouping of organisational activities (usually into ‘departments' or larger ‘divisions') can be done in different ways. Outline 7 criteria which can be used
What are the objectives of operating system? Objectives of OS 1. Convenience: An OS makes a computer more suitable to use. 2. Efficiency : An OS allows t
Question : The file system is the most visible aspect of an operating system. It provides the mechanism for on-line storage and access to both data and programs of the operatin
Write a short note about schedulers. Processes migrate between the various scheduling queues throughout its life time. The operating system should select for scheduling purpose
Q. Is disk scheduling except FCFS scheduling useful in a single-user environment? describe your answer. Answer: In a single-user environment the I/O queue typically is empty.
Define a public key encryption system Allows just the correct receiver to decode the data
What is sector sparing is proper definition
Write a note on semaphores A semaphore is a tool meant for synchronizing multiple processes trying to access a shared variable. That is a semaphore is used to deal with the cri
Explain the Exit (status) Function Exit function causes the calling process to be terminated. Actually, all file descriptors are immediately closed but the process is not
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