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Question 13Asked in DSSSB TGT Computer Science (Technical), 12 Sep 2025, Shift 1 (9:00 AM)

In which scheduling algorithm does the disk head move in one direction, satisfying all

In which scheduling algorithm does the disk head move in one direction, satisfying all requests until it reaches the end, and then reverses direction?
  1. ASCAN
  2. BSSTF
  3. CLOOK
  4. DFCFS
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Correct answer: (A) SCAN

Explanation

SCAN (elevator algorithm) moves the head in one direction serving requests all the way to the end of the disk, then reverses. LOOK reverses at the last request instead of the disk end.

From DSSSB TGT Computer Science PYQ (Technical), 12 Sep 2025, Shift 1 (9:00 AM)

This is question 13 of DSSSB TGT Computer Science PYQ (Technical), 12 Sep 2025, Shift 1 (9:00 AM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.