Operating System Multiple choice Questions and Answers-Swapping

1.	Paging _________.
a.	solves the memory fragmentation problem
b.	allows modular programming
c.	allows structured programming
d.	avoids deadlock

Answer: (a).solves the memory fragmentation problem

2.	Which of the following memory allocation scheme suffers from External fragmentation?
a.	Segmentation
b.	Pure demand paging
c.	Swapping
d.	Paging

Answer: (a).Segmentation

3.	The problem of fragmentation arises in ________.
a.	Static storage allocation
b.	Stack allocation storage
c.	Stack allocation with dynamic binding
d.	Heap allocation

Answer: (d).Heap allocation

4.	_________ allocates the largest hole (free fragmant) available in the memory.
a.	Best Fit
b.	Worst Fit
c.	First Fit
d.	None of the above

Answer: (b).Worst Fit

5.	Thrashing occurs ________.
a.	when excessive swapping takes place
b.	when you thrash your computer
c.	whenever deadlock occurs
d.	when no swapping takes place

Answer: (a).when excessive swapping takes place

6.	Thrashing ________.
a.	Reduces page I/O
b.	Decreases the degree of multiprogramming
c.	Implies excessive page I/O
d.	Improve the system performance

Answer: (c).Implies excessive page I/O

7.	By which of following the problem of thrashing is significantly affected ?
a.	program size
b.	program structure
c.	primary storage
d.	secondary storage

Answer: (b).program structure

8.	If the property of locality of reference is well pronounced in a program
a.	the number of page faults will be more
b.	the number of page faults will be less
c.	the number of page faults will same
d.	none of above

Answer: (b).the number of page faults will be less

9.	Which one is true
a.	The linkage editor is used to edit programs which have to later link together
b.	The linkage editor links object module during compiling
c.	The linkage editor links objects modules and resolves external references between them before loading
d.	none of above

Answer: (c).The linkage editor links objects modules and resolves external references between them before loading

10.	A high paging rate
a.	may cause a high I/O rate
b.	keeps the system running well
c.	is a symptom of too much processor activity
d.	always creates a slow system

Answer: (a).may cause a high I/O rate