CSci 4061 Online Quiz: Basic Concepts in Operating Systems
Question 1
Which of the following operations should NOT be allowed in the User Mode? 



Select the correct answer:
A:
Disable interrupts

B:
Read the time-of-day clock

C:
Set the time-of-day clock

D:
Change the Base/Bound register values

E:
Read or write to disk controller registers to perform I/O 

F:
Execute a system call

G:
Execute a trap instruction

H:
Modify Stack Pointer





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Quiz-System Author: Anand Tripathi 2013