(a) Suppose a circular array QUEUE has 6 memory locations. What are the values of FRONT and REAR after the following operations? a) Initially QUEUE…

(a) Suppose a circular array QUEUE has 6 memory locations. What are the values of FRONT and REAR after the following operations?

a) Initially QUEUE is empty.

b) A, C and D are added to the queue.

c) F is inserted;

d) Two letters are deleted;

e) K, L and M are added to the queue;

f) Two letters are deleted; and

g) R is added to the queue

(b) What is an operating system? Why do we need an operating system?

(c) What is deadlock? Describe the ways of detecting and protecting against deadlock.

(d) What is the relationship between the operating system and computer hardware?