Question

The transmit buffer of serial data buffer is a

(a) serial-in parallel-out register

(b) parallel-in serial-out register

(c) serial-in serial-out register

(d) parallel-in parallel-out register

This question was posed to me in an interview for job.

Asked question is from Architecture of 8051 topic in section Microcontroller 8051 of Microprocessor

Answer 1

Right answer is (b) parallel-in serial-out register

To explain I would say: The transmit buffer of serial data buffer is a parallel-in serial-out register.