UPSC CGGE (Combined Geo-Scientist) Exam Pattern 2026
The full UPSC CGGE (Combined Geo-Scientist) exam pattern for 2026 — 3 stages, with the sections, question count, marks, duration and negative marking for each, as set by Union Public Service Commission (UPSC). Then take a free UPSC CGGE (Combined Geo-Scientist) mock in the real pattern below.
Stage 1 — Preliminary Examination (objective, single day)
- Mode
- Offline OMR-based objective test, conducted in a single day across two sessions
- Sections
- Paper I: General Studies (common to all four streams) · Paper II: Discipline-specific objective paper in the chosen stream (Geology / Geophysics / Chemistry; Stream IV writes the Geology paper)
- Questions
- Paper I: 100 multiple-choice questions · Paper II: 100 multiple-choice questions
- Marks
- Paper I: 100 marks (1 mark per question) · Paper II: 300 marks (3 marks per question) · Prelims total: 400 marks
- Duration
- Paper I: 2 hours · Paper II: 2 hours
- Negative marking
- 1/3 of the marks for that question is deducted for every wrong answer. Unattempted questions carry no penalty.
Qualifying minimum is 1/3 of the total marks in each paper (set by UPSC each cycle; the commission may revise the cut-off). Prelims marks are NOT counted in the final merit list — Stage 1 is used only to shortlist candidates for the Mains (typically 6-8× the vacancies, stream- and category-wise). What this means for strategy: Paper II carries three times the marks of Paper I, so a candidate who is average in General Studies but strong in the discipline paper clears comfortably, while the reverse rarely does. With the one-third penalty the break-even accuracy is 25% on both papers; in Paper II each wrong answer costs a full mark, so eliminate before you guess. Paper I follows the UPSC pattern of Indian polity, history, geography, economy, environment, general science and current affairs at a level close to the Civil Services Preliminary paper, and its role is to keep you above the one-third qualifying line while Paper II does the ranking. The OMR sheet is machine-read, so darken circles completely and carry the specified black ballpoint pen; there is no online interface and no mark-for-review tool at this stage.
Stage 2 — Main Examination (conventional/subjective, written)
- Mode
- Offline pen-and-paper, conventional (descriptive) format, written in English only
- Sections
- Three discipline-specific papers in the chosen stream — Stream I and IV: Geology Paper I, II, III · Stream II: Geophysics Paper I, II, III · Stream III: Chemistry Paper I, II, III
- Questions
- Each paper is part conventional / part long-answer with internal choice; structured questions, derivations, labelled diagrams and short essays. No General Studies paper at the Mains stage.
- Marks
- 200 marks per paper × 3 papers = 600 marks total (Mains)
- Duration
- 3 hours per paper (typically two papers in one day across the schedule)
- Negative marking
- Not applicable — conventional papers are evaluated by stream specialists, and partial credit is awarded for steps, diagrams and labelled figures.
Mains is the merit-deciding written stage. Answers in Geology and Geophysics must be diagram-heavy — sketches of folds, faults, stratigraphic columns, gravity/magnetic anomaly profiles and well-log signatures fetch substantial marks. UPSC's stream-specific examiners are domain specialists, not generalists, so technical accuracy matters more than rhetorical flourish. Practical answer-writing rules that follow from the format: allocate time by marks before you start (roughly 1 minute per mark, with a reserve of 10-15 minutes for diagrams and checking); answer the compulsory questions first and choose optional ones where you can draw as well as write; label every diagram fully, because an unlabelled sketch earns almost nothing; and write derivations step by step, since partial credit is awarded per step. Use the standard technical vocabulary of the discipline rather than descriptive prose, and quote the Indian examples the examiners expect — Indian stratigraphic sequences, mineral belts and groundwater provinces for Geology and Streams IV, Indian survey case studies for Geophysics, and named reactions and instrumental methods for Chemistry. The three papers are typically spread over consecutive days, so keep your revision notes per paper ready in the order they are held.
Stage 3 — Personality Test (interview)
- Mode
- In-person interview before a UPSC board at Dholpur House, New Delhi
- Sections
- Panel-based viva — academic background, MSc thesis/dissertation, field-work exposure, awareness of GSI/CGWB mandates, India's mineral and groundwater scenario, current affairs around mining, environment, geo-hazards and water policy.
- Questions
- Not applicable — open-ended discussion
- Marks
- 200 marks
- Duration
- Typically 25-35 minutes
- Negative marking
- Not applicable
Final merit = Mains (600) + Personality Test (200) = 800 marks. Prelims scores are discarded once shortlisting is done. Stream-wise and category-wise merit lists are prepared separately; allocation between GSI (Streams I-III) and CGWB (Stream IV) follows the candidate's chosen stream — there is no cross-stream switching.
You know the pattern — now practise in it.
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