Computer Science here means the general IT awareness tested in clerical and investigative posts, not a university syllabus. The bank has more than 1,700 published questions, with the largest topics being computer hardware (processors, memory types, storage and ports), programming languages (who created them and what they are used for), operating systems and the history of computing from early mechanical machines to the personal computer.
Keyboard shortcuts and MS Word basics also feature, because papers for UDC, LDC and Assistant posts routinely ask them. Abbreviations are everywhere: expect to be asked what RAM, CPU, URL, HTTP or GUI stand for. Since FIA has a Cyber Crime Wing, its Sub Inspector papers in particular carry more computing questions than other agencies' tests do, and several of those papers are included in this bank. Most candidates find that a week of focused practice on hardware, abbreviations and shortcuts covers the majority of what turns up.