Question

The registers that store the keyboard and display modes and operations programmed by CPU are

(a) I/O control and data buffers

(b) Control and timing registers

(c) Return buffers

(d) Display address registers

I got this question at a job interview.

This interesting question is from the Keyboard/Display Controller 8279 topic in chapter Special Purpose Programmable Peripheral devices and their Interfacing of Microprocessor

Answer 1

Right option is (b) Control and timing registers

The explanation: The control and timing register to store the keyboard and display modes and other operations programmed by CPU.