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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.
how copy on write on pages when many process works at a same time?
ADVANTAGES OF MICROFERNEL IN YSTEM DESIGN?
What are the typical elements of a process image? User data: Modifiable part of user space. May have program data, user stack area, and programs that might be modified. User
Define UNIX device driver The UNIX device driver is structured into two halves called top half and bottom half
What advantages are there to this two-level directory? Users are isolated from each other. Users have more freedom in choosing file names.
Overlay structured program: A program consisting of overlays is referred as overlay structured program in which an overlay is a part of program which has similar load origin as
What is the purpose of the command interpreter? Why is it usually separate from the kernel? It reads commands from the user or from a file of commands and executes them, usuall
Define a layer that is not of an IO management module MCS that is Management Control System is not of an IO management module
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
The Most comman difference are given below System calls are heavy. While a procedure call can generally be performed in a few system instructions, a system call needs the c
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