Assuming the current disk cylinder to be $$50$$ and the sequence for the cylinders to be
$$1, 36, 49, 65, 53, 1, 2, 3, 20, 55, 16, 65$$ and $$78$$ find the sequences of servicing using
(i) shortest-seek time first $$(SSTF)$$
(ii) elevator disk scheduling polices.

The highest-response ratio next scheduling policy favours $$.......$$ jobs, but it also limits the waiting time of $$ .....$$ jobs.

Semaphore operations are atomic because they are implemented within the OS

Match the pairs in the following:

List - I

(A) Pointer data type
(B) Activation record
(C) Repeat-until
(D) Coercion

List - II

(p) Type conversion
(q) Dynamic data structure
(r) Recursion
(s) Nondeterministic loop