System Components

System Components
We can Create a System as large and complex as an os only by partitioning. it into smaller pieces. These
are known as system components :-
(1) Process Management :- When Program is in execution then it is called process for example :-
compiler is a process.
Every process needs some resources like CPU time, Memory, files, I/O devices etc. These Resources are
given to the process when it is created.
For example we consider a process whose function is to display the status of a file on the screen of
a terminate the process will be given as an input the name of the file and execute the process. In its
execution it performs or execute different instruction and system calls.
A Program is a passive entity like file stored on disk, where a process is an active entity. Program
counter specify the next instruction to execute. Process Execution must he sequential.
A Process in unit of work in a system. These system consist the collection of process O/S is reponsible
for the following activities :-
(1) Creating and deleting both user and system process
(2) Suspending and deleting both user and system process
(3) Provide mechanism of process synchronization
(4) Process communication
(5) Dead lock handling.