Q.The core efficiency idea behind a Computerised Accounting System's report generation is best described as:
(A) Enter the data many times, get one report
(B) Enter the data once, generate many reports from the same data
(C) Every report needs its own separate data entry
(D) Reports can only be generated once a year

The Day Book, Ledger, Trial Balance, and Final Accounts are all just different views generated from the identical set of vouchers entered exactly once.

The entire efficiency gain of computerised accounting rests on this single idea: a voucher entered exactly once automatically flows into every report — Day Book, Ledger, Trial Balance, Trading and Profit and Loss Account, Balance Sheet — generated on demand from that same underlying data, rather than compiled separately by hand for each one.

Option-by-option analysis:

• (A) Incorrect — this reverses the principle; data is entered ONCE, not many times.
• (B) Correct — this is exactly the "enter once, report many ways" idea. …