UPSC Prelims 2020 Question Paper & Solutions

UPSC Prelims 2020 solved question paper — GS Paper 1 and CSAT with full explanations, subject-wise breakdown, and the official cutoff.

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UPSC Prelims 2020 solved paper

Every question from the official paper with the correct answer and a full explanation. Click any row to open the detailed solution.

General Studies — Paper 1

100 / 100
QQuestionSubjectAnswerSolution
1Consider the following statements: 1. Aadhaar metadata cannot be stored for more than three months. 2. State cannot enter into any contract …polity-and-governanceBView
2Rajya Sabha has equal powers with Lok Sabha inpolity-and-governanceBView
3With reference to the funds under Members of Parliament Local Area Development Scheme (MPLADS), which of the following statements are correc…polity-and-governanceDView
4Which one of the following categories of Fundamental Rights incorporates protection against untouchability as a form of discrimination?polity-and-governanceDView
5In India, separation of judiciary from the executive is enjoined bypolity-and-governanceBView
6Along with the Budget, the Finance Minister also places other documents before the Parliament which include 'The Macro Economic Framework St…economyDView
7A constitutional government by definition is apolity-and-governanceDView
8Other than the Fundamental Rights, which of the following parts of the Constitution of India reflect/reflects the principles and provisions …polity-and-governanceDView
9In India, Legal Services Authorities provide free legal services to which of the following type of citizens? 1. Person with an annual income…polity-and-governanceAView
10Consider the following pairs: International agreement/set-up Subject 1. Alma-Ata Declaration : Healthcare of the people 2. Hague Convention …polity-and-governanceCView
11A Parliamentary System of Government is one in whichpolity-and-governanceBView
12Which part of the Constitution of India declares the ideal of Welfare State?polity-and-governanceAView
13Consider the following statements: 1. The Constitution of India defines its 'basic structure' in terms of federalism, secularism, fundamenta…polity-and-governanceBView
14One common agreement between Gandhism and Marxism ispolity-and-governanceAView
15In the context of India, which one of the following is the characteristic appropriate for bureaucracy?polity-and-governanceDView
16The Preamble to the Constitution of India ispolity-and-governanceDView
17"Gold Tranche" (Reserve Tranche) refers toeconomyDView
18With reference to the provisions contained in Part IV of the Constitution of India, which of the following statements is/are correct? 1. The…polity-and-governanceDView
19Consider the following statements: 1. According to the Constitution of India, a person who is eligible to vote can be made a minister in a S…polity-and-governanceAView
20Consider the following statements: 1. The President of India can summon a session of the Parliament at such place as he/she thinks fit. 2. T…polity-and-governanceCView
21With reference to the history of India, consider the following pairs: 1. Aurang : In-charge of treasury of the State 2. Banian : Indian agen…historyBView
22With reference to the religious history of India, consider the following statements: 1. Sthaviravadins belong to Mahayana Buddhism. 2. Lokot…art-and-cultureBView
23Which of the following statements correctly explains the impact of Industrial Revolution on India during the first half of the nineteenth ce…historyAView
24Consider the following events in the history of India: 1. Rise of Pratiharas under King Bhoja 2. Establishment of Pallava power under Mahend…historyCView
25Which of the following phrases defines the nature of the 'Hundi' generally referred to in the sources of the post-Harsha period?economyCView
26With reference to the book "Desher Katha" written by Sakharam Ganesh Deuskar during the freedom struggle, consider the following statements:…historyAView
27The Gandhi-Irwin Pact included which of the following? 1. Invitation to Congress to participate in the Round Table Conference 2. Withdrawal …historyBView
28The Vital-Vidhvansak, the first monthly journal to have the untouchable people as its target audience was published byhistoryAView
29With reference to the history of India, the terms "kulyavapa" and "dronavapa" denotehistoryAView
30Who among the following rulers advised his subjects through this inscription ? "Whosoever praises his religious sect or blames other sects o…historyAView
31With reference to the cultural history of India, which one of the following is the correct description of the term 'paramitas'?art-and-cultureCView
32In the context of Indian history, the Rakhmabai case of 1884 revolved around 1. women's right to gain education 2. age of consent 3. restitu…historyBView
33Indigo cultivation in India declined by the beginning of the 20th century because ofhistoryBView
34Wellesley established the Fort William College at Calcutta becausehistoryDView
35With reference to the history of India, "Ulgulan" or the Great Tumult is the description of which of the following events?historyDView
36With reference to the scholars/litterateurs of ancient India, consider the following statements: 1. Panini is associated with Pushyamitra Sh…historyCView
37In the context of recent advances in human reproductive technology, "Pronuclear Transfer" is used forscience-and-technologyDView
38With the present state of development, Artificial Intelligence can effectively do which of the following? 1. Bring down electricity consumpt…science-and-technologyBView
39With reference to Visible Light Communication (VLC) technology, which of the following statements are correct? 1. VLC uses electromagnetic s…science-and-technologyCView
40With reference to "Blockchain Technology", consider the following statements: 1. It is a public ledger that everyone can inspect, but which …science-and-technologyDView
41With reference to carbon nanotubes, consider the following statements: 1. They can be used as carriers of drugs and antigens in the human bo…science-and-technologyDView
42Consider the following activities : 1. Spraying pesticides on a crop field 2. Inspecting the craters of active volcanoes 3. Collecting breat…science-and-technologyDView
43"The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilo…science-and-technologyDView
44Consider the following statements: 1. Genetic changes can be introduced in the cells that produce eggs or sperms of a prospective parent. 2.…science-and-technologyDView
45What is the importance of using Pneumococcal Conjugate Vaccines in India? 1. These vaccines are effective against pneumonia as well as menin…science-and-technologyBView
46In India, the term "Public Key Infrastructure" is used in the context ofscience-and-technologyAView
47Which of the following statements are correct regarding the general difference between plant and animal cells ? 1. Plant cells have cellulos…science-and-technologyCView
48Which of the following are the reasons/factors for exposure to benzene pollution? 1. Automobile exhaust 2. Tobacco smoke 3. Wood burning 4. …geographyDView
49If another global financial crisis happens in the near future, which of the following actions/policies are most likely to give some immunity…economyAView
50If you withdraw ₹ 1,00,000 in cash from your Demand Deposit Account at your bank, the immediate effect on aggregate money supply in the econ…economyDView
51With reference to Foreign Direct Investment in India, which one of the following is considered its major characteristic?economyBView
52With reference to the international trade of India at present, which of the following statements is/are correct? 1. India's merchandise expo…economyDView
53The term 'West Texas Intermediate', sometimes found in news, refers to a grade ofeconomyAView
54In the context of the Indian economy, non-financial debt includes which of the following? 1. Housing loans owed by households 2. Amounts out…economyDView
55In India, why are some nuclear reactors kept under "IAEA Safeguards" while others are not?science-and-technologyBView
56With reference to Trade-Related Investment Measures (TRIMS), which of the following statements is/are correct? 1. Quantitative restrictions …economyCView
57If the RBI decides to adopt an expansionist monetary policy, which of the following would it not do ? 1. Cut and optimize the Statutory Liqu…economyBView
58With reference to the Indian economy after the 1991 economic liberalization, consider the following statements: 1. Worker productivity (₹ pe…economyBView
59Consider the following statements: 1. In terms of short-term credit delivery to the agriculture sector, District Central Cooperative Banks (…economyBView
60In India, under cyber insurance for individuals, which of the following benefits are generally covered, in addition to payment for the loss …economyBView
61In India, which of the following can be considered as public investment in agriculture? 1. Fixing Minimum Support Price for agricultural pro…economyCView
62What is the importance of the term "Interest Coverage Ratio" of a firm in India? 1. It helps in understanding the present risk of a firm tha…economyAView
63Which of the following factors/policies were affecting the price of rice in India in the recent past? 1. Minimum Support Price 2. Government…economyDView
64Consider the following statements: 1. The value of Indo-Sri Lanka trade has consistently increased in the last decade. 2. "Textile and texti…economyBView
65In which one of the following groups are all the four countries members of G20?economyAView
66Under the Kisan Credit Card scheme, short-term credit support is given to farmers for which of the following purposes ? 1. Working capital f…economyBView
67Consider the following statements: 1. The weightage of food in Consumer Price Index (CPI) is higher than that in Wholesale Price Index (WPI)…economyAView
68Consider the following pairs: River Flows into 1. Mekong : Andaman Sea 2. Thames : Irish Sea 3. Volga : Caspian Sea 4. Zambezi : Indian Ocea…geographyBView
69Consider the following statements: 1. In the case of all cereals, pulses and oil-seeds, the procurement at Minimum Support Price (MSP) is un…economyDView
70With reference to the Indian economy, consider the following statements: 1. 'Commercial Paper' is a short-term unsecured promissory note. 2.…economyCView
71With reference to the cultural history of India, consider the following pairs: 1. Parivrajaka : Renunciant and Wanderer 2. Shramana : Priest…historyBView
72With reference to Indian elephants, consider the following statements: 1. The leader of an elephant group is a female. 2. The maximum gestat…geographyAView
73Which of the following Protected Areas are located in Cauvery basin ? 1. Nagarhole National Park 2. Papikonda National Park 3. Sathyamangala…geographyCView
74With reference to India's biodiversity, Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet and White-throated redstart aregeographyAView
75Which one of the following protected areas is well-known for the conservation of a sub-species of the Indian swamp deer (Barasingha) that th…geographyAView
76Steel slag can be the material for which of the following? 1. Construction of base road 2. Improvement of agricultural soil 3. Production of…economyDView
77Which of the following are the most likely places to find the musk deer in its natural habitat? 1. Askot Wildlife Sanctuary 2. Gangotri Nati…geographyAView
78In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon foo…geographyAView
79Consider the following statements: 1. Coal ash contains arsenic, lead and mercury. 2. Coal-fired power plants release sulphur dioxide and ox…geographyDView
80What is the use of biochar in farming? 1. Biochar can be used as a part of the growing medium in vertical farming. 2. When biochar is a part…geographyDView
81If a particular plant species is placed under Schedule VI of The Wildlife Protection Act, 1972, what is the implication?geographyAView
82With reference to the period of Gupta dynasty in ancient India, the towns Ghantasala, Kadura and Chaul were well known ashistoryAView
83What is/are the advantage/advantages of zero tillage in agriculture ? 1. Sowing of wheat is possible without burning the residue of previous…geographyDView
84According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels ? 1. Ca…economyAView
85Which one of the following statements best describes the term 'Social Cost of Carbon'? It is a measure, in monetary value, of thegeographyAView
86With reference to pulse production in India, consider the following statements: 1. Black gram can be cultivated as both kharif and rabi crop…geographyAView
87"The crop is subtropical in nature. A hard frost is injurious to it. It requires at least 210 frost-free days and 50 to 100 centimeters of r…geographyAView
88With reference to solar water pumps, consider the following statements : 1. Solar power can be used for running surface pumps and not for su…science-and-technologyDView
89With reference to the current trends in the cultivation of sugarcane in India, consider the following statements: 1. A substantial saving in…geographyCView
90In the context of India, which of the following is/are considered to be practice(s) of eco-friendly agriculture ? 1. Crop diversification 2.…geographyDView
91What are the advantages of fertigation in agriculture ? 1. Controlling the alkalinity of irrigation water is possible. 2. Efficient applicat…geographyCView
92Consider the following minerals : 1. Bentonite 2. Chromite 3. Kyanite 4. Sillimanite In India, which of the above is/are officially designat…economyDView
93With reference to Ocean Mean Temperature (OMT), which of the following statements is/are correct? 1. OMT is measured up to a depth of 26°C i…geographyBView
94With reference to chemical fertilizers in India, consider the following statements : 1. At present, the retail price of chemical fertilizers…economyBView
95With reference to India's Desert National Park, which of the following statements are correct? 1. It is spread over two districts. 2. There …geographyCView
96Siachen Glacier is situated to thegeographyDView
97With reference to the history of India, consider the following pairs: Famous Place Present State 1. Bhilsa : Madhya Pradesh 2. Dwarasamudra …historyAView
98Consider the following statements: 1. 36% of India's districts are classified as "overexploited" or "critical" by the Central Ground Water A…geographyBView
99Consider the following statements: 1. Jet streams occur in the Northern Hemisphere only. 2. Only some cyclones develop an eye. 3. The temper…geographyCView
100Among the following Tiger Reserves, which one has the largest area under "Critical Tiger Habitat"?geographyCView

CSAT — Paper 2 (qualifying)

79 / 79
QQuestionSubjectAnswerSolution
1In India, over the last decade or so, labour has been departing agriculture, but is only going to construction and unregistered manufacturin…Reading ComprehensionDView
2In India, the current focus on the right to privacy is based on some new realities of the digital age. A right is a substantive right only i…Reading ComprehensionAView
3One of the biggest ironies around water is that it comes from rivers and other wetlands. Yet it is seen as divorced from them. While water i…Reading ComprehensionCView
4Asset allocation is the most important investment decision we will ever make, and sadly, most of us do not give that decision the importance…Reading ComprehensionAView
5Although most of the Genetically Modified (GM) crops cultivated now are genetically engineered for a single trait, in future, crops genetica…Reading ComprehensionBView
6Although most of the Genetically Modified (GM) crops cultivated now are genetically engineered for a single trait, in future, crops genetica…Reading ComprehensionCView
7How many zeroes are there at the end of the following product? 1 × 5 × 10 × 15 × 20 × 25 × 30 × 35 × 40 × 45 × 50 × 55 × 60Quantitative AptitudeAView
8Let XYZ be a three-digit number, where (x + y + z) is not a multiple of 3. Then (XYZ + YZX + ZXY) is not divisible byQuantitative AptitudeBView
9Let p, q, r and s be natural numbers such that p - 2016 = q + 2017 = r - 2018 = s + 2019 which one of the following is the largest natural n…Quantitative AptitudeCView
10How many five-digit prime numbers can be obtained by using all the digits 1, 2, 3, 4 and 5 without repetition of digits?Quantitative AptitudeAView
11In the sum A + 1A + 5A + AA + A1 = 1AA for which digit does the symbol A stand?Quantitative AptitudeBView
12If you have two straight sticks of length 7.5 feet and 3.25 feet, what is the minimum length can you measure?Quantitative AptitudeBView
13A simple mathematical operation in each number of the sequence 14, 18, 20, 24, 30, 32, .... results in a sequence with respect to prime numb…Logical ReasoningCView
14One page is torn from a booklet whose pages are numbered in the usual manner starting from the first page as 1. The sum of the numbers on th…Quantitative AptitudeBView
15Consider the following arrangement that has some missing letters: abab_b_bcb_dcdcded_d The missing letters which complete the arrangement ar…Logical ReasoningCView
16Let A3BC and DE2F be four-digit numbers where each letter represents a different digit greater than 3. If the sum of the numbers is 15902, t…Quantitative AptitudeCView
17Two statements S1 and S2 are given below followed by a Question: S1: There are not more than two figures on any page of a 51-page book. S2: …Logical ReasoningCView
18Consider the following data: | | Average marks in English | Average marks in Hindi | | Girls | 9 | 8 | | Boys | 8 | 7 | | Overall average ma…Quantitative AptitudeAView
19A family of two generations consisting of six members P, Q, R, S, T and U has three males and three females. There are two married couples a…Logical ReasoningBView
20If in a particular year 12th January is a Sunday, then which one of the following is correct?Logical ReasoningCView
21Private investment in general is volatile. Foreign private investment is more volatile because the available investment avenues are signific…Reading ComprehensionDView
22Many opportunities to harness the highly skewed, seasonal and spatial distribution of monsoon flows, which occur in a four-month period from…Reading ComprehensionAView
23People will invest in education whenever they are granted the economic freedom to fully enjoy benefits Again, this is for the obvious reason…Reading ComprehensionAView
24Our urban bodies cannot possibly ensure sustainable delivery of water in our cities unless financing mechanisms are put in place. Water deli…Reading ComprehensionAView
25Our urban bodies cannot possibly ensure sustainable delivery of water in our cities unless financing mechanisms are put in place. Water deli…Reading ComprehensionBView
26In India, agriculture still engages about half of workforce, and about 85 ( ) per cent of its farms mall and marginal. Compared to China Vie…Reading ComprehensionBView
27In India, agriculture still engages about half of workforce, and about 85 per cent of its farms mall and marginal. Compared to China Vietnam…Reading ComprehensionDView
28Two Statements S1 and S2 are given below with regard to four numbers P, Q, R and S followed by a Question: S1: R is greater-than P as well a…Logical ReasoningCView
29Two Statements Si and S2 are given below followed by a Question: S1: n is a prime number. S2: n leaves a remainder of 1 when divided by 4. I…Quantitative AptitudeDView
30Two Statements S1 and S2 are given below with regard to two numbers followed by a Question: S1: Their product is 21. S2: Their sum is 10. Qu…Quantitative AptitudeCView
31A man walks down the backside of his house straight 25 meters, then turns to the right and walks 50 meters again; then he turns towards left…Logical ReasoningDView
32Two Statements are given followed by two Conclusions: Statements: All numbers are divisible by 2. All numbers are divisible by 3. Conclusion…Logical ReasoningAView
33Two Statements are given followed by two Conclusions: Statements: All cats are dogs. All cats are black. Conclusion- I: All dogs are black. …Logical ReasoningCView
34Consider the following sequence of numbers: 5 1 4 7 3 9 8 5 7 2 6 3 1 5 8 63852243496 How many odd numbers are followed by the odd number in…Logical ReasoningBView
35A is 16th from the left end in a row or boys and V is 18th from the right end. Q is 11th from A towards the right and 3rd from V towards the…Logical ReasoningBView
36Three Statements S1, S2 and S3 are given below followed by a Question: S1: C is younger than D, but older than A and B. S2: D is the oldest.…Logical ReasoningDView
37How many integers are there between 1 and 100 which have 4 as a digit but are not divisible by 4? 38. Let x,y be the volumes; m,n be the mas…Quantitative AptitudeCView
38Let x,y be the volumes; m,n be the masses of two metallic cubes P and Q respectively. Each side of Q is two times that of P and mass of Q is…Quantitative AptitudeAView
39The average age of a teacher and three students is 20 years. If all the three students are of same age and the difference between the age of…Quantitative AptitudeCView
40A person bought a car and sold it for Rs. 3, 00,000. If he incurred a loss of 20%, then how much did he spend to buy the car?Quantitative AptitudeDView
41Spanish ships in the late 16th century first brought the potato tuber from South America to Europe whereby in the early 19th century, it bad…Reading ComprehensionDView
42India is at once among the fastest growing global economies and home to the largest number of malnourished children in the world. There are …Reading ComprehensionCView
43In India, authorities always look to store the maximum amount of water in reservoirs during the monsoon season, which is then used for irrig…Reading ComprehensionDView
44Economic liberalization in India was shaped largely by the economic problems of the government than by the economic priorities of the people…Reading ComprehensionAView
45Economic liberalization in India was shaped largely by the economic problems of the government than by the economic priorities of the people…Reading ComprehensionDView
46A shop owner offers the following discount options on an article to a customer: Successive discounts or 10% and 20% , and then pay a service…Quantitative AptitudeDView
47The letters from A to Z are numbered from 1 to 26 respectively. If GHI = 1578 and DEF = 912, then what is ABC equal to?Logical ReasoningDView
48What is the missing term in the following? ACPQ : BESU:: MNGI: @Logical ReasoningDView
49What is the largest number among the following?Quantitative AptitudeCView
50What is the greatest length x such that 3% m and 8% m are integral multiples of x?Quantitative AptitudeDView
51| Year | Birth rate | Death rate | |---|---|---| | 1911 - 1921 | 48.1 | 35.5 | | 1921 - 1931 | 46.4 | 36.3 | | 1931 - 1941 | 45.2 | 31.2 | |…Quantitative AptitudeDView
52The recurring decimal representation 1.272727... is equivalent toQuantitative AptitudeBView
53What is the least four-digit number when divided by 3, 4, 5 and 6 leaves a remainder 2 in each case?Quantitative AptitudeBView
54In adult Population or a city, 40% men and 30% women are married. What is the percentage of married adult population if no man marries more …Quantitative AptitudeCView
55What is the remainder when 51 × 27 × 35 × 62 × 75 is divided by 100?Quantitative AptitudeAView
56A sum of Rs. 2,500 is distributed among X, Y and Z in the ratio 1/2 : 3/4 : 5/6. What is the difference between the maximum share and the mi…Quantitative AptitudeCView
57For what value of it, the sum of digits in the number (10n + 1) is 2?Quantitative AptitudeBView
58In a class, there are three groups A, B and C. If one student from group A and two students from group B are shifted to group C, then what h…Quantitative AptitudeCView
59How many different sums can be formed with the denominations Rs. 50, Rs. 100, Rs. 200, Rs. 500 and Rs. 2,000 taking at least three denominat…Quantitative AptitudeDView
60Bank credit to the industrial sector has started shrinking. Its decline has been a serious concern as credit growth is essential to revive i…Reading ComprehensionCView
61India has tremendous potential for solar energy. We all realize that we have to stop burning fossil fuels to meet our energy needs. But cert…Reading ComprehensionCView
62India has tremendous potential for solar energy. We all realize that we have to stop burning fossil fuels to meet our energy needs. But cert…Reading ComprehensionDView
63Genome editing is different from genome modification. Genome editing typically involves finding the part of a plant genome that could be cha…Reading ComprehensionBView
64Many people understand the connection n solid waste management and health in terms of the consequences of unattended heaps of garbage which …Reading ComprehensionCView
65In Part III of the constitution which assures people certain fundamental rights, Article 25 proclaims that "all persons are equally entitled…Reading ComprehensionBView
66How many different 5-letter words (with or without meaning) can be constructed using all the letters of the word 'DELHI' so that each word h…Quantitative AptitudeDView
67A bottle contains 20 litres of liquid A. 4 litres of liquid A is taken out of it d replaced by same quantity of liquid B. Again 4 litre of t…Quantitative AptitudeCView
68The average score of a batsman after his 50th innings was 46.4. After 60th innings, his average Score increases by 2.6. What was his average…Quantitative AptitudeCView
69As a result of 25% hike in the price of rice per kg, a person is able to purchase 6 kg less rice for Rs. 1,200. What Was the Original price …Quantitative AptitudeBView
70A person can complete 20% of work in 8 days and another person y can complete 25% of the same work in 6 days. If they work together, in how …Quantitative AptitudeAView
71A car travels from a place X to place Y at an average speed of v km/hr from y to X at an average speed of 2v km/hr, again from X to y at an …Quantitative AptitudeBView
72Consider the following statements: The minimum number of points of intersection of a square and a circle is 2. The maximum number of points …Quantitative AptitudeBView
73A man takes half time in rowing a certain distance downstream than upstream. What is the ratio or the speed in still water to the speed of c…Quantitative AptitudeDView
74How many pairs of natural numbers are there such that the difference of whose squares is 63?Quantitative AptitudeAView
75Which one of the following will have minimum change in its value if 5 is added to both numerator and the denominator of the fractions 2/3, 3…Quantitative AptitudeDView
76A digit n > 3 is divisible by 3 but not divisible by 6. Which one of the following is divisible by 4?Quantitative AptitudeDView
77If 1 litre of water weighs 1 kg, then how many cubic millimetres of water will weigh 0.1 gm?Quantitative AptitudeCView
78A vessel full of water weighs 40 kg. If it is one-third filled, its weight becomes 20 kg. What is the weight of the empty vessel?Quantitative AptitudeAView
79A frog tries to come out of a dried well 4.5 m deep with slippery walls. Every time the frog jumps 30 cm, slides down 15 cm. what is the num…Quantitative AptitudeBView

Official cutoff — 2020

The cutoff UPSC announced for that year.

Official UPSC Prelims 2020 GS Paper 1 cutoff (out of 200). CSAT qualifying threshold remained 66/200.

General
92.51
EWS
77.55
OBC
89.12
SC
74.84
ST
68.71

Subject-wise weightage

How GS Paper 1 distributed marks across History, Polity, Geography, Economy, Science & Tech, Environment and Current Affairs.

  • economy27 (27%)
  • geography24 (24%)
  • polity-and-governance18 (18%)
  • history16 (16%)
  • science-and-technology13 (13%)
  • art-and-culture2 (2%)

Frequently asked questions

Where can I download the UPSC Prelims 2020 question paper?
Every question from the official UPSC Prelims 2020 GS Paper 1 and CSAT paper is reproduced above with the correct answer and a detailed explanation. UPSC also hosts scanned PDFs of all four sets on upsc.gov.in under the "Examinations" section.
What was the official cutoff for UPSC Prelims 2020?
The General category cutoff for UPSC Prelims 2020 was 92.51 marks out of 200 (GS Paper 1 only). The official cutoff strip above lists every category — EWS, OBC, SC, ST and PwBD subcategories.
How is the UPSC Prelims 2020 paper scored?
GS Paper 1 had 100 questions worth 2 marks each (200 total) with 0.66 negative marking. CSAT had 80 questions worth 2.5 marks each (200 total) with 0.83 negative marking. Only GS Paper 1 marks count towards the cutoff; CSAT had to be cleared at 33%.
Are Set A, B, C and D papers different?
No. UPSC distributes four shuffled versions with identical content but different question orders. Our archive shows the canonical order — the questions are the same regardless of which set you wrote.
Can I use the UPSC Prelims 2020 paper for current practice?
Yes. PYQ revision is one of the highest-yield activities for current aspirants. UPSC reuses themes and concepts every few years, so working through 2020 questions sharpens both content recall and the elimination strategy that UPSC's MCQ format rewards.
Were any answers in the UPSC official key for that year challenged?
UPSC accepts written objections to its provisional answer key during a fixed window each year. A small number of questions across most years are dropped or have answers changed in the final key — the version shown above reflects UPSC's final accepted answers.
Is CSAT counted in the Prelims cutoff?
No. CSAT (Paper 2) is qualifying only — you must score 33% (66 of 200 marks) to qualify, but the merit cutoff is decided entirely by GS Paper 1 marks.
How do I practice UPSC Prelims 2020 questions in test mode?
Click any row in the answer key to open the full-solution page. Each question carries subject and topic tags so you can build subject-wise revision sets, and the test generator (linked from the header) can compose a timed mock from any year or subject.