Computer Fundamentals
🔒 Log in to trackGenerations 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.
One page per subtopic: detailed notes, every question type, formulas, tricks and practice sets.
Every formula on one printable page, grouped by subtopic.
4 exam-level questions worked step by step.
81 questions — untimed practice or a timed test with analysis.
Track record in the exam
Test difficulty mix (81 questions)
Question patterns exams keep repeating
Taken from previous-year papers. If a pattern is marked "very common", expect to see it in your exam.
Generation-to-technology mapping
very commonThe stem names a technology (vacuum tube, transistor, IC, microprocessor) or a machine (ENIAC, IBM 360) and asks its generation, or the reverse. Statement variants ask which feature belongs to which generation.
How to solve: Recall the ladder vacuum tube (1st) → transistor (2nd) → IC (3rd) → microprocessor (4th) → AI (5th) and match the technology first, the years second — year ranges differ between books but the technology order never does.
Example: Third-generation computers were built around:
Integrated Circuits (ICs) — whole circuits printed on one silicon chip; they brought keyboards, monitors and operating systems.
Full form / abbreviation recall
very common'What is the full form of BIOS / ALU / MICR / UPS?' or a wrongly-matched pair where one expansion has one wrong word.
How to solve: Expand letter by letter from the family table (CPU family, memory family, device family). The classic traps: UPS = Uninterruptible (not Uninterrupted), POST = Power-On Self-Test (not Power On System Test), VDU = Visual (not Video).
Example: The full form of POST is:
Power-On Self-Test — the start-up diagnostic that checks hardware before the OS loads.
Firsts in computing history
common'First commercial computer', 'first electronic digital computer', 'first microprocessor', 'first stored-program computer' — a superlative with machine names as options.
How to solve: Keep the firsts chain pinned: ABC 1942 (first electronic digital) → ENIAC 1946 (first general-purpose electronic) → EDSAC 1949 (first stored-program) → UNIVAC-I 1951 (first commercial) → Intel 4004 1971 (first microprocessor). Read the exact adjective in the stem.
Example: Which machine is regarded as the first commercially available computer?
UNIVAC-I (1951) — ENIAC was earlier but experimental; UNIVAC-I was the first sold to businesses.
CPU part / machine cycle
common'Which unit performs arithmetic or comparison?', 'which register holds the next address?', 'the correct order of fetch/decode/execute/store'.
How to solve: CPU = ALU (all maths and logic) + CU (direction only, no calculation) + registers (fastest storage). The cycle is always Fetch → Decode → Execute → Store; reversed Decode/Fetch or Execute/Store pairs are the planted traps.
Example: In the machine cycle, the step that interprets what the instruction means is:
Decode — done by the Control Unit, between Fetch (bring it) and Execute (do it).
Odd-one-out among translators/types
common'Which is not a programming language?', 'which is not a translator?', 'which one is a markup language?' — three options from one family, one from another.
How to solve: Classify each option first: HTML = markup (not programming); assembler = assembly-language translator; compiler/interpreter = high-level translators. The odd option is usually a famous name placed in the wrong family.
Example: Which of the following is not a translator?
HTML — it is a markup language. Assembler, compiler and interpreter are all translators.
Computer classification and use-case matching
commonA workplace or workload is described — bank records, railway reservation (mainframe), weather forecasting (supercomputer), a single user's laptop (micro), a hybrid petrol-pump unit — and the class is asked.
How to solve: Use the two ladders: size (Super → Mainframe → Mini → Micro) and principle (analog measures continuous, digital counts 0/1, hybrid does both). Bulk transactions for thousands of users = mainframe; one enormous calculation = supercomputer.
Example: A petrol-pump machine that measures fuel flow continuously and prints the price digitally is a:
Hybrid computer — analog measurement combined with digital computation.
Pioneer and language-level matching
common'Who invented the mouse / WWW / punched cards?', 'the first programmer was', 'SQL belongs to which language generation?' — name-contribution or language-level pairs.
How to solve: Hold the pioneer table (Babbage, Ada, Turing, von Neumann, Hopper, Berners-Lee, Engelbart, Hollerith) and the GL ladder (1GL machine → 2GL assembly → 3GL high-level → 4GL SQL → 5GL AI). Watch the classic swaps: Ada vs Hopper, WWW vs Internet, HTML vs programming language.
Example: The first-generation (1GL) language that needs no translator is:
Machine language — pure 0s and 1s executed directly by the CPU; assembly (2GL) needs an assembler.