PAI MCQ's SET-7
21. By using privilege mechanism the
protection from unauthorized accesses is done to
a) operating system
b) interrupt handlers
c) system software
d) all of the mentioned
Answer: d
22. The task privilege level at the
instant of execution is called
a) Descriptor privilege level (DPL)
b) Current privilege level (CPL)
c) Effective privilege level (EPL)
d) none of the mentioned
Answer: b
23. Once the CPL is selected, it can
be changed by
a) HOLD
b) transferring control using system descriptors
c) transferring control using gate descriptors
d) transferring control using interrupt descriptors
Answer: c
24. The data segments defined in GDT
(global descriptor table) and the LDT (local descriptor table) can be accessed
by a task with
a) privilege level 0
b) privilege level 1
c) privilege level 2
d) privilege level 3
Answer: a
25. A task with privilege level 0,
does not refer to all the lower level privilege descriptors in
a) GDT (global descriptor table)
b) LDT (local descriptor table)
c) IDT (interrupt descriptor table)
d) none of the mentioned
Answer: b
26. The selector RPL that uses a
less trusted privilege than the current privilege level for further use is
known as
a) Least task privilege level
b) descriptor privilege level
c) effective privilege level
d) none of the mentioned
Answer: c
27. The effective privilege level is
a) maximum numeric of RPL and CPL
b) minimum privilege of RPL and CPL
c) numeric minimum and privilege maximum of RPL and CPL
d) none of the mentioned
Answer: c
28. The task requesting an access to
a descriptor is allowed to access after checking the
a) type of descriptor
b) privilege level
c) type of descriptor and privilege level
d) corresponding segment
Answer: c
29. A CALL instruction can reference
only a code segment descriptor with
a) DPL less privilege than CPL
b) DPL equal privilege to CPL
c) DPL greater privilege than CPL
d) all of the mentioned
Answer: b
30. The RPL of a selector that
referred to the code descriptor must have
a) less privilege than CPL
b) greater privilege than CPL
c) equal privilege than CPL
d) any privilege regarding CPL
Answer: c
31. By using privilege mechanism the protection from unauthorized accesses is
done to
a) operating system
b) interrupt handlers
c) system software
d) all of the mentioned
Answer: d
32. The task privilege level at the instant of execution is called
a) Descriptor privilege level (DPL)
b) Current privilege level (CPL)
c) Effective privilege level (EPL)
d) None of the mentioned
Answer: b
33. Once the CPL is selected, it can be changed by
a) hold
b) transferring control using system descriptors
c) transferring control using gate descriptors
d) transferring control using interrupt descriptors
Answer: c
34. The data segments defined in GDT (global descriptor table) and the LDT
(local descriptor table) can be accessed by a task with
a) privilege level 0
b) privilege level 1
c) privilege level 2
d) privilege level 3
Answer: a
35. A task with privilege level 0, doesn’t refer to all the lower level
privilege descriptors in
a) GDT (global descriptor table)
b) LDT (local descriptor table)
c) IDT (interrupt descriptor table)
d) None of the mentioned
Answer: b
36. The selector RPL that uses a less trusted privilege than the current
privilege level for further use is known as
a) Least task privilege level
b) Descriptor privilege level
c) Effective privilege level
d) None of the mentioned
Answer: c
37. The effective privilege level is
a) maximum numeric of RPL and CPL
b) minimum privilege of RPL and CPL
c) numeric minimum and privilege maximum of RPL and CPL
d) none of the mentioned
Answer: c
38. The task requesting an access to a descriptor is allowed to access after
checking the
a) type of descriptor
b) privilege level
c) type of descriptor and privilege level
d) corresponding segment
Answer: c
39. A CALL instruction can reference only a code segment descriptor with
a) DPL less privilege than CPL
b) DPL equal privilege to CPL
c) DPL greater privilege than CPL
d) All of the mentioned
Answer: b
40. The RPL of a selector that referred to the code descriptor must have
a) less privilege than CPL
b) greater privilege than CPL
c) equal privilege than CPL
d) any privilege regarding CPL
Answer: c
