Answer / kishor narayan

Volatile qualifier indicates to the compiler that the
variable can be modified at any stage of the program
execution. This can happen even if the region of code being
executed might not have any access to the variable in
question. In that sense, Volatile qualifier does the
opposite of the Const qualifier.
@Vignesh1988i -> Volatile qualifier does not assign any
garbage value to the variable.

Answer / kala

it is the variable which can be modified outside of the
program. i.e hardwares can modify this variable. To avoid
compiler optimization we can use volatile.
this is used for memory mapped hardware and shared memory
usuage.

Answer / pur

if you use volatile variables then code optimization will
not happen at compilation time, so .o size will be more.

Answer / vignesh1988i

volatile keyword is a one in which assigns some garbage
value to the variables declared with this keyword..........
before assigning some values by the user to the variables.

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