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