UPSC Prelims 2020 Question Papers [GS Paper & CSAT]

The UPSC has conducted the Civil Services Preliminary Exam 2020 on 4th October 2020. BYJU’S has uploaded the UPSC Prelims question papers in this article. You can download the PDFs of both the GS Paper and CSAT from the links provided on this page.

Latest Update about UPSC Prelims UPSC CSE Prelims 2020 Result is declared. Check the result at the linked article now!

Download UPSC Prelims Paper 1 (GS Paper 1)

The UPSC Prelims GS Paper 1 comprises of 100 questions from the UPSC Prelims Syllabus for GS 1. It covers various topics from history, economy, polity, geography, science and technology, environment and ecology, etc. 

UPSC Prelims 2020 GS 1 Question Paper:- Download PDF Here

You can download the UPSC Prelims 2020 Answer Key for GS Paper 1 and CSAT from here.

Download UPSC Prelims Paper 2 (CSAT)

The CSAT paper is basically an aptitude test where the UPSC evaluates the candidates on comprehension skills, logical reasoning, analytical and communication skills, decision making, problem-solving, basic numeracy and mental ability. There are 80 questions in this paper.

UPSC Prelims 2020 GS 2 (CSAT) Question Paper:- Download PDF Here

The CSAT paper is only a qualifying paper and is not counted for the merit ranking. The GS paper 1 is counted for the merit ranking. In order to clear the IAS Prelims exam, candidates should get the qualifying score for the CSAT and get a score above the cut-off marks in the GS 1 paper. Read more about UPSC Cut-off in the linked article.

If you have cleared the UPSC Prelims 2020, enrol now for the BYJU’S IAS Mains Test Series 2020. With UPSC standard questions and insightful feedback & expert evaluation, it is the perfect tool to help you clear the IAS mains as well, and take a step closer to fulfilling your IAS dream.

Watch UPSC CSE 2020 Discussion, Analysis & Expected Cut-Off LIVE below:

Aspirants can download the 2019 UPSC Prelims question papers from the link.

You can fill a Form here giving your expected UPSC Prelims 2020 marks:

Click here to fill the Form:- Fill and submit form

Candidates should know that the UPSC has negative marking in both GS 1 and CSAT papers. For more information on how to calculate your score after the negative marking scheme of the UPSC, click on the linked article.

UPSC Prelims is the first hurdle to leap over if you want to realize your IAS dreams. The following table gives a few important links for successfully preparing for the IAS prelims exam.


  1. 1. Understand UPSC Syllabus
    2. Start with NCERTs and complement with daily newspaper.
    3. Refer to UPSC previous years’ question papers.
    4. Read Rajiv Ahir’s Brief of Modern History, M. Laxmikanth’s Indian Polity for GS 1 and 2 respectively.
    5. Revise often.
    6. Take mock tests periodically.


    1. There are two papers in UPSC Prelims and nine theory papers in UPSC Mains. For further clarity, check UPSC Exam Pattern.

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