Match the LIST-I with LIST-II.

LIST-I	LIST-II
A. Disk Scheduling	I. Round Robin
B. Batch Processing	II. SCAN
C. Time Sharing	III. LIFO
D. Interrupt Processing	IV. FIFO

Choose the correct answer from the options given below:

Explanation

SCAN (the 'elevator' algorithm) is a classic disk-scheduling technique, so Disk Scheduling pairs with SCAN (II). Early batch-processing systems run submitted jobs strictly in arrival order, i.e. First-In-First-Out, so Batch Processing pairs with FIFO (IV). Time-sharing systems give each process a fixed time slice in rotation, which is Round Robin scheduling, so Time Sharing pairs with Round Robin (I). Interrupts, especially nested ones, are serviced Last-In-First-Out (the most recently raised interrupt is handled first, and control returns to the earlier ones afterward), so Interrupt Processing pairs with LIFO (III). The match is therefore A-II, B-IV, C-I, D-III.