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Basic concepts
When a process is to be changed in, the pager guesses which pages will be used before the process is changed out again. Instead of swapping in a entire process, the pager brings only those essential pages into memory. The valid-invalid bit scheme can be used to distinguish among pages that are in memory and those pages that are on the disk. Access to a page marked unacceptable causes a page-default trap. This trap is the result of the operating system's failure to bring the needed page into memory.
TII stands for The abbreviation of TII is Table of incomplete instructions.
OPERATING SYSTEM 1. Describe the term operating system. Write down the functions of operating system. 2. Explain Thread? Write down the advantages and disadvantages of threa
What is the resident set and working set of a process? Resident set is that portion of the process image that is actually in real-memory at a certain instant. Working set is th
what is inter process communication..
50 peripharal device name ,diagram and uses
Linked allocation With linked allocation, every file is a linked list of disk blocks; the disk blocks might be scattered anywhere on the disk. The directory has a pointer to th
Q. Presume that you have a page-reference string for a process with m frames (initially all empty). The page-reference string has length p along with n distinct page numbers
A scheduler that selects processes from secondary storage device is known as Medium term scheduler is a scheduler that selects processes from secondary stor
What is process control block? Every process is represented in the OS by a process control block. It has many pieces of information associated with an exact process.
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