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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
Write a note about Directory structure with examples. The FreeBSD directory hierarchy is basic to obtaining an overall understanding of the system. The most significan
What are the different file operations? Create : - Space for the file in the file system update directory table. Write : - file name and data to be written is
System Service Program system service program Supports and provides the services for other program. System service program perform Varity of tasks. They are further divided in
What are the advantages of Linked allocation? The benefits are a. No external fragmentation b. Size of the file does not require to be declared
how do you calculate page faults
What is a Relocatable program? The Relocatable programs can be loaded almost anywhere in memory.
List and discuss the various services provided by the operating system. Program execution - system capability to load a program into memory and to run it. I/O operatio
How a virtual memory can be implemented? What are the benefits of using virtual memory?
Message passing system:- The function of message system is to permit processes to communicate with one another without the requirement to resort (option) to shared data. Commun
Hashed page tables A common approach for handling address spaces larger than 32 bits is to use a hashed page table. Every entry in the hash table having a linked list of elemen
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