Q. 29 Which of the following must be true for the RFE (Return from Expectation)
instruction on a general purpose processor.
1. It must be a trap instruction 2. It must be a privileged instruction 3. An exception can not be allowed to occur during execution of an RFE instruction.
(A) 1 only
(B) 2 only
(C) 1 and 2 only
(D) 1, 2 and 3 only
Answer: (D)
Explanation:
