ISRO | ISRO CS 2009 | Question 10

The correct matching of the following pairs is

(A) Disk check              (1) Roundrobin
(B) Batch processing        (2) Scan
(C) Time sharing            (3) LIFO
(D) Stack operation         (4) FIFO

(A)

A B C D
 3 4 2 1

(B)

A B C D
4 3 2 1

(C)

A B C D
3 4 1 2

(D)

A B C D
2 4 1 3

Answer: (D)

Explanation: Option (D) is correct:
A: Disk check- (2) Various scan algorithms are used for disc checking like FCFS, SSTF, SCAN, C-SCAN, LOOK, C-LOOK etc.
B: Batch Processing- In batch processing processes are strictly executed in FIFO order.
C: Time sharing- In Round Robin scheduling algorithm, the processes perform CPU execution in time sharing manner as there is a fixed time quanta associated with each process for execution.
D: Stack operation- stack operates in last in first out manner.

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