Computer · Subject
Computer Knowledge
Computer Knowledge appears only in Tier 2. It is Section III (Module I) of Paper I, the Computer Knowledge Test (CKT): 20 questions x 3 marks = 60 marks in 15 minutes (20 minutes for candidates allowed a scribe). It runs in Session I straight after Section II (Reasoning + GA).
| Item | Detail |
|---|---|
| Questions / marks | 20 / 60 (3 marks each) |
| Time | 15 minutes |
| Negative marking | 1 mark per wrong answer (same as Sections I and II) |
| Nature | Mandatory but qualifying - marks do NOT count towards merit |
| Minimum to qualify | UR 30%, OBC/EWS 25%, all others 20% (18, 15 and 12 of 60 marks) |
| Merit | Decided by Sections I and II of Paper I only |
Higher bar for some posts: where Computer Proficiency is an essential qualification, a higher CKT qualifying standard is applied. These posts include ASO (CSS/MEA/AFHQ), Assistant SFIO, Assistant in GSI and IMD, Inspector (CGST/Central Excise), Preventive Officer, Examiner, Executive Assistant (CBIC) and Postal/Sorting Assistant. Treat 30% as the floor, not the target.
Official syllabus (four blocks):
- Computer basics - organisation of a computer, CPU, input/output devices, computer memory, memory organisation, back-up devices, ports, Windows Explorer, keyboard shortcuts.
- Software - Windows operating system, basics of MS Word, MS Excel and PowerPoint.
- Working with the Internet and e-mail - web browsing and searching, downloading and uploading, managing an e-mail account, e-banking.
- Networking and cyber security - networking devices and protocols, network and information security threats (hacking, virus, worms, Trojans etc.) and preventive measures.
Recent papers are almost entirely direct factual recall: shortcut keys (hyperlink, bookmark, Excel date), full forms, which generation used which technology, device and protocol identification, and statements about malware. Office questions, especially MS Word, form the largest block.
How to prepare this section
The one-line plan
Qualify with a wide margin, then stop. CKT marks do not enter the merit list, but failing it cancels your whole Tier 2. Aim for 45+ of 60 so that the higher Computer Proficiency bar for ASO, Inspector and Postal Assistant posts is never a risk.
Priority order (maximum return first)
- Keyboard shortcuts - 2-4 questions per paper, pure memory. Learn the Windows, Word, Excel, PowerPoint, browser and F1-F12 tables.
- MS Word, MS Excel, MS PowerPoint - the largest block. Cover extensions, tabs and features, Excel functions and cell references, error values, and views and transitions.
- Computer fundamentals + hardware and memory - generations, CPU units, input/output devices, memory hierarchy and units, ports, and number-system conversions (practise these until they take 30 seconds).
- Internet and e-mail - protocols, CC/BCC, URL parts, browsers vs search engines, e-banking (NEFT/RTGS/IMPS/UPI).
- Networking - LAN/MAN/WAN, topologies, devices by OSI layer, IP classes, port numbers.
- Cyber security - malware types, attack names (phishing, vishing, pharming, DDoS), preventive tools, key IT Act sections.
- Software and OS - system vs application vs utility software, OS functions, booting, file systems.
Time plan inside the 15 minutes
- First pass (about 8 minutes): answer every question you know instantly (about 25 seconds each).
- Second pass (about 5 minutes): return to questions where you can confidently rule out two options, and work the number conversions.
- Last 2 minutes: review marked answers. Do not guess blindly.
Attempt strategy
- With 1 negative mark against 3 positive, a pure guess from four options has an expected value of zero (0.25 x 3 - 0.75 x 1). Guess only after ruling out at least one option; ruling out two makes it clearly worthwhile.
- 15 sure answers (45 marks) clear every qualifying standard comfortably, so accuracy matters more than attempts.
- Read the application named in the question. Ctrl+D, Shift+F3, F5 and Ctrl+H mean different things in Word, Excel, PowerPoint and browsers.
Six-week preparation plan (alongside the main sections)
| Week | Focus |
|---|---|
| 1 | Fundamentals, generations, CPU, hardware and memory, number systems |
| 2 | Windows and OS, software types, keyboard shortcuts (Windows + function keys) |
| 3 | MS Word + Word shortcuts |
| 4 | MS Excel + PowerPoint + their shortcuts |
| 5 | Internet, e-mail, e-banking, networking |
| 6 | Cyber security + two full CKT mocks per week and shortcut revision |
Spend 20 minutes a day on this section. That is enough to qualify, and it leaves the rest of your time for the merit sections.
Topics in study order
High importance = asked in nearly every shift. Do these first. (8 high · 2 medium · 0 low)
Generations of computers, types, basic organisation (CPU, ALU, CU), pioneers and the abbreviations bank. Two to three guaranteed marks in the Tier-2 Computer Knowledge Test and the base for every other computer topic.
Memory hierarchy and units, binary/octal/decimal/hex conversions, input-output devices, ports and storage media. Number-conversion and memory-unit questions are near-guaranteed marks because they need no theory recall - only method.
System vs application vs utility software, what an OS does, Windows features, and file systems. Classification (odd-one-out) questions are the most frequent pattern here.
Word-processing features, formatting defaults, mail merge, references and the Word shortcut set. Shift analyses regularly put 2-4 CKT questions on Word - mostly shortcut keys and default settings.
Spreadsheet structure, cell references, functions, formula errors, charts and shortcuts. Excel gives the most 'compute-the-answer' questions in CKT - COUNT/IF/VLOOKP outputs are verifiable, so marks are safe.
Slides, placeholders, views, slide master, transitions vs animations and the show-control keys (F5, Esc, B/W). PowerPoint questions are short-recall - mostly extensions, views and slideshow keys.
Internet history and structure, browsers vs search engines, URL/DNS, e-mail mechanics (To/CC/BCC, SMTP/POP3/IMAP) and India's e-banking rails (UPI, NEFT, RTGS). Full forms and the browser-vs-engine trap are asked every year.
Network types and topologies, devices (hub/switch/router), the OSI model, IP addressing and TCP/UDP with port numbers. Device-to-layer matching and IP-class identification are CKT regulars.
Malware families (virus, worm, trojan, ransomware), social-engineering attacks (phishing and cousins), preventive measures, and IT Act 2000 sections with CERT-In. Statement-based malware questions appear in nearly every CKT shift.
One consolidated bank of Windows, Word, Excel, PowerPoint, browser and function-key shortcuts. The syllabus names keyboard shortcuts explicitly, and 2-4 of the 20 CKT questions are pure shortcut recall, so these are the cheapest marks in the module.