Instruction CBI PORTB,1 means
(a) clearing the PORTB register
(b) clearing the first bit of the PORTB register
(c) setting the PORTB register
(d) setting the first bit of the PORTB register
This question was addressed to me in an interview for internship.
My query is from I/O Port Programming and Addressing Modes topic in section AVR Microcontroller of Microcontroller