On-line transaction processing is used when ______________. I) it is required to answer random queries. II) it is required to ensure correct processing. III) all files are available on-line. IV) all files are stored using hard disk.

A. i, ii

B. i, iii

C. ii, iii, iv

D. i, jj ,iii

Answer: Option B

Solution(By Examveda Team)

On-line transaction processing is used when it is required to answer random queries and all files are available on-line.