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What is a path name? A pathname is the path from the root by all subdirectories to a specified file. In a two-level directory structure a user name and a file name explain a pa
with the aid of diagrams describe the following os structures monolithic , layered, client server
Concept of Reentrancy It is a useful, memory-saving method for multiprogrammed timesharing machines. A Reentrant method is one in which multiple clients can share a singl
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
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,
about error detection in operating system and how does it take place?
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
Regard as a computer system that runs 5000 jobs per month with no deadlock-prevention or deadlock-avoidance scheme. Deadlocks take place about twice per month and the operator must
Describe swapping technique in UNIX systems. Swapping is used to control memory contention among processes. If there is excessively much memory contention, processes are swappe
define pipe
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