WHAT WILL BE THE DATA RECEIVED BY THE SERIAL BUFFER , IF IT IS CONFIGURED FOR A BAUD RATE 'X' AND A SQUARE PULSE OF FREQUENCY '2X' IS INJECTED TO THE "Rx" PIN OF THE SERIAL PORT.

I know I should not answer this question since it is in those ugly capitals.

the answer is: most likely all 0, a slim possibilioty od all "1'

Erik