Answer Posted / sivaramaraju

for example u started running a program than internally
what happens, the program will be loaded into the memory
and os will start the execution of your program.

In the same time one of the running applications in your
computer want to use the same program than what happens

if your program is process based
than a new copy of the program will be loaded into the
memory and operating system will start the execution of the
second one.that means there are two copies of the same
program are there in the memory.here it is the case of only
two if 100 applications want to use the same program
simultaneously than 100 copies of the same program will be
loaded into the memory.

if your program is thread based
in this case if the program is already loaded into the
memory the os never loads one more copy into the memory.
the os executes the earlier loaded program.so if 100
applications want to use the same program only one copy of
the program need to be loaded into the memory.so there will
be large amount of free memory.so u can load more number of
vusers

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