"Special Files" are the device drivers that provide the interface to I/O hardware.
Driving and driving, texting and driving, and teens that might not be able to hear or see at the best of their ability. Hope this helps :D
data declaration means a variable which contain data value and it can be declared as integer, float, character, double, boolean (data types).
example:
int r;
char name;
float g;
double k= 23.34;