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
Correct Answer: i, iii
On-line transaction processing is used when it is required to answer random queries and all files are available on-line.