Answer:
Microcontroller is a modern version of controlling system help to guide any type of electronic gadte in one word it is a "revolution" broght about in ffield of electronic world this has got a special type of ROM and ram (flash memory ) which are pre programmed and acts as an erasaable programmble read only memory and has got a set of registers in it which follows the pattern of A,B,R0,R1,R2,...........R8.....R16 and so on depends on the regiter it has it memory .