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What are the operations of processes?
Process creation
A process may create several new processes. The creating process is called as parent process, where as the new process is called the children processes. When a processes makes a sub processes, the parent may have to partition its resources among its children.
When a process creates new processes, two possibilities exist in terms of implementation.
1. The parent continues to implement concurrently with its children.
2. The parent waits unless some or all of its children have terminated.
example of first fit best fit and worst fit
Compare user threads and kernel threads. User threads:- User threads are supported above the kernel and are executed by a thread library at the user level. Thread creation
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LOOK o Like SCAN except stops moving inwards (or outwards) when no more requests in that direction exist. C-SCAN (circular scan) o Moves inwards servicing requests u
Consider a large web-based database. In some sense, Google is sort of like this. There might be many users who want to read from the database, but only a few users who are allowed
a summary of what operating system do
Define System Call A system call is a request that is made by any program to the operating system for carrying out tasks - picked from a predefined set - which the said program
What are files and explain the access methods for files? File definition Attributes, operations and types Direct access Sequential access with diagram Other access
KERNEL-LEVEL THREADS (KLT) In this level every thread management is done by kernel .No thread library except an API system calls to the kernel thread facility exists. The kern
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