CDS-I 2026 Paper Analysis and Expected Cutoff OTA
- Neha Singh
- 1 day ago
- 10 min read
General Studies | English | Elementary Mathematics
Exam Date: 12 April 2026 (Sunday)
Table of Content
Exam at a Glance
Conducting Body | Union Public Service Commission (UPSC) |
Exam Name | Combined Defence Services (CDS) Examination (I), 2026 |
Date of Exam | Sunday, 12 April 2026 |
Papers | General Studies | English | Elementary Mathematics |
Total Questions | GS: 120 | English: 120 | Maths: 100 |
Total Marks | GS: 100 | English: 100 | Maths: 100 |
Time Allowed | 2 Hours per paper |
Negative Marking | 1/3 mark deducted for each wrong answer |
Series Used | Series A (KPRS codes) |
The UPSC CDS-I 2026 examination was conducted on Sunday, 12 April 2026 across examination centres nationwide. This year's paper maintained UPSC's tradition of blending static knowledge with current affairs and analytical questions.
Below is The Cavalier's comprehensive, section-wise analysis of all three papers — General Studies, English, and Elementary Mathematics — to help aspirants understand difficulty trends, topic weightages, and preparation strategy for future attempts.
General Studies (GS) — Paper Analysis
The GS paper comprised 120 questions worth 100 marks (2 hours). It covered a wide range of subjects including Science, Geography, History, Polity, Economy, and Current Affairs, with questions printed in both Hindi and English.
Section-wise Topic Breakdown for GS
Topic / Subject Area | Approx. Qs | Difficulty Level |
Biology & Life Sciences (Cell, Enzymes, Diseases, Genetics) | ~9 | Moderate |
Physics (Laws of Motion, Optics, Electricity, Waves) | ~9 | Moderate |
Chemistry (Elements, Chemical Formulas, Acid-Base, Periodic Table) | ~10 | Moderate |
Computer Science (Languages, Memory, OS, CDMA) | ~5 | Easy–Moderate |
Indian Economy & Budget (Budget 2025-26, PMFBY, Schemes) | ~8 | Moderate |
Geography – Physical (Rocks, Volcanoes, Weathering, Soils) | ~12 | Moderate |
Geography – India (Rivers, Passes, Ports, National Parks, Forests) | ~8 | Easy–Moderate |
Geography – World (Ocean Currents, Tides, Sargasso Sea) | ~4 | Moderate |
Ancient & Medieval History (Inscriptions, Trade, Art, Dynasties) | ~12 | Moderate–Hard |
Modern History (Gandhi, Vivekananda, Swadeshi Movement) | ~4 | Easy |
World History (Industrial Revolution) | ~1 | Easy |
Indian Polity & Constitution (Articles, Governor, NCBC, Lists) | ~15 | Moderate–Hard |
Indian & International Organisations (SAARC, BIMSTEC, UN) | ~4 | Easy–Moderate |
Social Issues & Welfare Schemes (GII, MPI, Sexual Harassment Act) | ~5 | Easy |
Defence-specific (CDS role, IMA/NDA/NDC, Territorial Army) | ~4 | Easy |
Current Affairs 2025-26 (FTA, Operations, Sports, DRDO, Schemes) | ~10 | Moderate |
Key Highlights — GS Paper
Biology was the heaviest opener — Q1 to Q10 covered cell biology, enzyme function, disease types, genetics, and heart anatomy. A student strong in NCERT Science Class 9-10 would have found this section scoring.
Physics questions tested conceptual understanding: Newton's second law (qualitative description), concave mirror image formation, resistivity of conductors, EMF of batteries, and longitudinal vs transverse waves. Formula-rote was less helpful than conceptual clarity.
Chemistry was diverse — spanning matter vs compounds, chemical formulas of common substances (baking powder, bleaching powder, Plaster of Paris), hardness of water, soap micelles, periodic table trends, and esterification. The question on Baking Powder formula (NaHCl₂) was a deliberate trap.
Computer Science tested assembly languages (x86, MIPS vs Python/Java), flash memory characteristics, UNIX OS features, MP3 compression (60 mins ≈ 50 MB), and CDMA technology — all standard CST topics.
Polity was substantial — questions on Article 368 (amendment procedure), Article 243 (Panchayati Raj), State List items, Governor's powers (Advocate-General, State PSC), UN Peacekeeping authorisation, CDS (Chief of Defence Staff) role, and training types at IMA/NDA/NDC. All these are PYQ-heavy areas.
Geography was the largest chunk overall — physical geography covered volcanic cones, mechanical weathering, metamorphic rocks, igneous rocks, Black Soils (Regur), ocean currents, Sargasso Sea, types of tides, and theories of Earth's origin. India geography covered rivers (Brahmaputra/Dihang), Shipki-La pass, National Parks, coal mining companies, and forest research institutes.
Ancient History was demanding — questions on Junagadh Rudradaman inscription, Bower Manuscript, Arikamedu maritime trade, Basohli painting style, Magadha's rise, Ashokan edicts, medieval movements (Basavanna/Virashaiva), and the Rihla travel account. These required specific static knowledge beyond standard textbooks.
Current Affairs (2025-26) appeared in the final stretch — India-New Zealand FTA (December 2025 cooperation areas: AYUSH, audio-visual tourism, traditional knowledge, horticulture), Operation Sagar Bandhu (HADR for Vietnam), PESA Mahotsav 2025, Sujalam Bharat App, PM-MITRA scheme (integrated textile parks), SDAT Squash World Cup 2025 (India's first title), DRDO-RRU MoU, ONGC Green Energy 10 GW target, and Washington Sundar's T20 milestone.
Overall GS Difficulty
The GS paper was Moderate to Moderately Difficult. The Science and basic Economy sections were accessible, while Ancient History, detailed Polity articles, and niche Current Affairs questions were challenging. A well-prepared student could have attempted 90–100 questions confidently.
CDS 2026-I English — Paper Analysis
The English paper comprised 120 questions worth 100 marks (2 hours). UPSC maintained its consistent format with questions spanning vocabulary, comprehension, grammar, and literary usage.
Section-wise Topic Breakdown
Section / Question Type | Approx. Qs | Difficulty Level |
Confusable Word Pairs (Q1–10) | 10 | Easy–Moderate |
Synonyms in Context / Underlined Words (Q11–20) | 10 | Moderate |
Word Meanings — Standalone (Q21–30) | 10 | Moderate |
Sentence Arrangement / Jumbled Paragraphs (Q31–40) | 10 | Moderate |
Idioms and Phrases (Q41–50) | 10 | Moderate |
Antonyms in Context (Q51–60) | 10 | Moderate–Hard |
Word Class Identification (Q61–70) | 10 | Easy |
Prepositions and Determiners (Q71–80) | 10 | Easy |
Confusables — Usage Identification (Q81–90) | 10 | Moderate |
Sentence Relationship (S1–S2) (Q91–100) | 10 | Moderate |
Word/Term Matching (List I–II) (Q101–110) | 10 | Moderate–Hard |
Error Identification (Q111–115) | 5 | Moderate |
Reading Comprehension (Q116–120) | 5 | Easy–Moderate |
Key Highlights — English Paper
Word Pairs (Confusables) were the opening section — Pontoon/Platoon, Invoke/Revoke, Imminent/Eminent, Liable/Libel, Incredible/Incredulous, Climatic/Climactic, Cursor/Cursory, Affect/Effect, Hard/Hardly, Conscious/Conscience. These standard confusables are a CDS staple and reward methodical vocabulary preparation.
Synonyms in context tested words like understatement (underplaying significance), nadir (all-time low), interspersed (combined), effusive (expressing approval with strong feelings), ingenuous (naive), conspicuous (noticeable), rudimentary (elementary), travesty (mockery), abstruse (recondite). These are upper-intermediate vocabulary items.
Standalone meanings tested Iconoclast (person who doesn't adhere to accepted beliefs), Axiom, Holistic, Obsequious, Pachyderm, Ubiquitous, Desiccate, Deleterious, Equivocate (use vague language to conceal truth), and Indolent. These appear frequently in CDS and must be known cold.
Jumbled Paragraphs covered diverse themes — origin of the word 'science', Britain's industrialisation, William I and feudal England, feudalism, Japan's Tokugawa economy, cricket ball-catching physics, staircase injuries across cultures, lantana plant invasion, biodiversity, and the agricultural revolution. These test logical sequencing and comprehension simultaneously.
Idioms tested: Mealy-mouthed, Live in each other's pockets, Play possum (pretend to be dead), Work like a dog (work very hard), Open a can of worms (spark complications), More than meets the eye, Hold the fort, It's all Greek to me, To close ranks (unite to defend a common interest), Be under a cloud (object of suspicion). All standard CDS-level idioms.
Antonyms were contextual and tricky — contemptuous → reverential, ephemeral → everlasting, parsimonious → extravagant, tempestuous → tranquil, arduous → easy and effortless, perpetual → transitory, distraught → composed, demure → brazen, pittance → bonanza, ponderous → elegant.
Word Classes (Q61–70) were the most straightforward — identifying whether underlined words were nouns, verbs, adverbs, adjectives, prepositions, gerunds, or participles. 'Swimming is good for health' — Swimming is a gerund (noun), was the only slightly tricky item.
List Matching (Q101–110) covered sophisticated vocabulary: Fortuitous/Fortitudinous/Formidable/Forlorn; Tautological/Ontological/Epistemological/Epidemiological; Epitaph/Epistle/Epithet/Epigram; Nihilism/Fatalism/Hedonism/Egoism; Blizzard/Tornado/Thunderstorm/Typhoons; Implication/Complication/Supplication/Application; Ascribe/Prescribe/Proscribe/Inscribe; Pragmatist/Promethean/Promontory/Prolix; Bequeath/Mortgage/Endowment/Lease; Incensed/Incendiary/Incautious/Incandescent. This section tests high-level academic vocabulary.
Reading Comprehension passage was about urban life and the conflict between cities and nature — discussing the 'biophilia hypothesis' (proposed by Harvard biologist E.O. Wilson), ecopsychology, and Pennsylvania hospital recovery study. Five questions covered the passage and tested inference, keyword identification, and word meaning in context.
Overall English Difficulty
The English paper was Moderate overall. Vocabulary sections were challenging for candidates without systematic preparation, but grammar (word classes, prepositions) and jumbled paragraphs were accessible to regular readers. A confident English aspirant could have scored 75+ marks.
Elementary Mathematics — Paper Analysis
The Maths paper comprised 100 questions worth 100 marks (2 hours). Unlike GS and English which have 120 questions, Maths carries 1 mark per question with no bonus for attempting extra. This makes strategic accuracy critical.
Section-wise Topic Breakdown
Topic | Approx. Qs | Difficulty Level |
Algebra (Exponents, Identities, Polynomials, HCF/LCM) | ~12 | Moderate |
Number System (Divisibility, Primes, Remainders, Digit Problems) | ~10 | Moderate |
Work and Time / Pipes and Cisterns | ~3 | Easy–Moderate |
Speed, Distance, Time (Trains, Boats, Streams) | ~4 | Moderate |
Logarithms | ~2 | Moderate |
Commercial Mathematics (CI, Discounts, Percentage, Alloys) | ~8 | Moderate |
Ratio, Proportion, Variation (Direct/Inverse) | ~3 | Easy |
Statistics (Mean, Median, Deviations) | ~4 | Easy–Moderate |
Mensuration – 2D (Triangles, Circles, Quadrilaterals) | ~16 | Moderate–Hard |
Mensuration – 3D (Cube, Sphere, Cylinder, Cuboid, Wire) | ~6 | Moderate |
Trigonometry (Identities, Heights & Distances) | ~12 | Moderate–Hard |
Data Sufficiency (Q71–80) | ~10 | Hard |
Ages / Ratios / Mixture Problems | ~5 | Moderate |
Sequences and Linked Question Sets | ~5 | Moderate |
Key Highlights — Maths Paper
Algebra was strong — Q1 asked about z^(p²/qr) × z^(q²/rp) × z^(r²/pq) when p+q+r=0 (answer: 1). Multiple linked sets appeared — Q83-86 based on 16(x⁴ + 1/x⁴) − 257 = 0 and Q85-86 on x = (√6+√5)/(√6−√5) etc. These chain questions reward students who solve the initial expression correctly.
Trigonometry was the most extensively tested topic — Q41 asked about tan²θ + cot²θ when cosθ/(1−sinθ) + cosθ/(1+sinθ) = 4; Q43 tested 4tanθ + 3cotθ when 3sinθ + 4cosθ = 5; Q44-45 were heights-and-distances problems involving towers; Q91-100 were a heavy set with expressions like cosecθ − sinθ = p³, secθ − cosθ = q³ and p + q cotθ = 3cosecθ. This area consistently separates high scorers from average ones.
Geometry (2D Mensuration) was the single largest area — triangles (right-angled, isosceles, equilateral), cyclic quadrilaterals, inscribed circles, circles with chords, and complex geometric relations. Q36 (semi-circle on ABC with AP=AB=10cm), Q51 (right-angled isosceles triangle perimeter 20 units), Q55 (midpoint BC in triangle), Q68 (angle bisector and BD×DC) — these required careful diagram drawing.
3D Mensuration covered standard problems: Q58 (sphere diameter 14cm in cylinder of radius 14cm — water level rise), Q61 (copper sphere diameter 6cm melted into wire of diameter 0.5cm — find length: ≈ 5.76m), Q66 (rectangular sheet folded into open box), Q69 (cube volume 8cm³ = cuboid — find how many such cuboids possible).
Data Sufficiency (Q71–80) was the most unusual and challenging section — questions gave a problem and two statements, asking whether the problem could be solved using either statement alone, both together, or neither. This section heavily penalises guessing. Topics included inscribed circle in equilateral triangle, quadrilateral properties, cyclic quadrilateral, rhombus, three numbers with LCM/HCF, 3-digit number, composite numbers, and r^n < 1.
Work-Time problems: Q9 (8 men + 24 women vs 12 men + 18 women complete work in 1 day — find time for 24 men + 72 women), Q14 (X does work in 4 days, Y in 6 days — alternating). Q15 was a three-variable wall-building problem (12 men × 8 hours × 10 days → adjust for 16 men × 10 hours with different wall dimensions).
Number System highlights: Q21 (27²⁷ − 9⁴⁰ − 3⁷⁹ divisible by how many natural numbers less than 10), Q24 (greatest N dividing 600, 631, 724 with equal remainders = 31), Q31 (P = N² where N is odd — remainder when P divided by 8 is always 1). These classic number theory questions appeared in PYQs and reward pattern recognition.
Overall Maths Difficulty
The Maths paper was Moderate to Hard — harder than English but comparable to recent CDS Maths papers. Data Sufficiency and advanced Trigonometry were the most demanding sections. A student targeting 60+ marks should aim to clear all Algebra, Number System, basic Commercial Maths, simple Geometry and Statistics — then pick selectively from Trigonometry and leave Data Sufficiency.
Overall Exam Difficulty and Expected Cutoffs
Based on the paper analysis, here is our assessment:
Paper | Max Marks | Difficulty | Safe Score* |
General Studies | 100 | Moderate | 55–65 |
English | 100 | Moderate | 60–70 |
Elementary Mathematics | 100 | Moderate–Hard | 45–55 |
* Safe Score = estimated score to remain in a competitive range for written result; actual cutoffs depend on total number of candidates and vacancy notifications.
Preparation Strategy for CDS-II 2026 Aspirants
If you appeared in CDS-I 2026 or are preparing for the next attempt, here are focused takeaways from this paper:
General Studies
Biology matters — NCERT Science Class 9-10 is non-negotiable. Cell biology, enzyme function, and disease-pathogen mapping appear every year.
Polity goes deep — beyond basics, study Governor's discretionary powers, constitutional amendment procedure (Art. 368), and specifically what falls in State List vs Concurrent List.
Geography is vast but high-yield — physical geography (rocks, weathering, volcanoes, soils, ocean currents), India geography (rivers, passes, ports, National Parks), and forest types deserve 2-3 dedicated revision cycles.
Ancient History requires specific names — Ashokan inscriptions with locations, maritime trade sites (Arikamedu), manuscript names (Bower Manuscript), and regional painting styles (Basohli) appear regularly. Build a dedicated flashcard set.
Current Affairs must cover at least 12 months before the exam — track FTAs, defence operations, sports world cups, scheme launches, and DRDO/ISRO updates monthly.
Defence-specific GK — IMA vs NDA vs NDC vs Officers Training Academy and their training functions; Chief of Defence Staff roles; Territorial Army vs regular forces. These are direct scoring questions for CDS.
English
Vocabulary is king — build a daily word list of 10 confusables and 10 standalone meanings. Norman Lewis's Word Power Made Easy remains the gold standard.
Sentence arrangement — practice ordering jumbled paragraphs daily. Focus on opening statements (topic sentence) and transition words (however, therefore, consequently).
Idioms — The Cavalier recommends maintaining a running list of 100 common English idioms. CDS repeats many from past papers.
RC passages — practice reading dense academic paragraphs (scientific, sociological, historical) and answering inference-based questions. The time pressure on RC is low since only 5 questions come from one passage.
Word classes and prepositions are easy marks — never leave these. Practise 20 questions daily for two weeks to achieve near-perfect accuracy.
Elementary Mathematics
Master Trigonometry first — it carries the highest weightage and appears both as standalone questions and in linked 2-question sets. Focus on identities, heights and distances, and expressions involving sinθ ± cosθ.
Geometry is unavoidable — practise triangle theorems (Pythagoras, angle bisector, mid-point), cyclic quadrilateral properties, and circle theorems until they become automatic.
Data Sufficiency — learn to recognise quickly whether a question is answerable. Do not attempt to fully solve; assess sufficiency only. This saves time and avoids penalty.
Number Theory basics — divisibility rules, remainders, HCF-LCM properties, and digit problems appear every year and are time-efficient scoring areas.
3D Mensuration — sphere, cylinder, and cube problems are formulaic. Memorise the key formulas and practice 5-10 application problems per shape.
Do NOT attempt everything — with 1 mark per question and 1/3 penalty, a strategy of attempting 70–80 questions at 80%+ accuracy outperforms attempting all 100 at 60% accuracy.
Closing Note from The Cavalier
CDS-I 2026 was a well-balanced paper overall — tough enough to differentiate but not designed to discourage. Students who had consistent NCERT revision, current affairs tracking, and regular mock tests were well-placed.
The Cavalier provides detailed CDS, NDA, AFCAT, and defence exam preparation resources at cavalier.in — including full-length mocks, current affairs digests, and subject-wise notes. If you appeared in CDS-I 2026, use this analysis to identify your gaps and begin a focused preparation cycle for CDS-II 2026.
Visit us at cavalier.in for complete CDS preparation resources.
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