Question

Which of the following unit provides security to the processor?

(a) bus interface unit

(b) execution unit

(c) peripheral unit

(d) memory protection unit

This question was posed to me in a job interview.

The origin of the question is Memory Protection Unit topic in chapter Memory Systems of Embedded Systems

Answer 1

Correct choice is (d) memory protection unit

For explanation I would say: The memory management unit and the memory protection unit provides security to the processor by trapping the invalid memory accesses before they corrupt other data.