BYJU’S has come up with UPSC Prelims 2021 Answer Key on 10th October for both Prelims GS Paper 1 and CSAT. The answer key has been curated by the UPSC Experts and PDFs of set-wise prelims answer keys will be provided hereafter the examination.

The UPSC Prelims for 2021 took place on October 10, 2021. As the official UPSC Answer Key is released post the final results of the Civil Services Examination, aspirants can check their GS and CSAT answers with our UPSC Prelims Answer Key 2021.

UPSC Prelims Answer Key for GS Paper-I

The GS Paper-I has 100 questions, carrying two marks each. There is a negative marking of ⅓ of the total marks assigned to the questions, for each wrong answer. The UPSC Prelims GS Paper-I Answer Key :

UPSC Prelims GS (Paper 1) Answer Key 2021 PDF (SET C):- Download PDF Here

UPSC Prelims Answer Key for CSAT

The CSAT for UPSC Prelims GS Paper-II has 80 questions, carrying 2.5 marks each. Similar to GS Paper-I, this paper also carries a negative marking of ⅓ of the total marks assigned to that question, for every wrong answer. The UPSC Prelims GS Paper-II/CSAT Answer Key:

UPSC Prelims CSAT (Paper 2) Answer Key 2021 PDF (SET D):- Download PDF Here

Download the UPSC Prelims Question Paper 2021 in the linked article.

IAS exam candidates can have a look at the UPSC Prelims Answer Key from 2016-2020 that has been curated by our subject experts.

UPSC Prelims Answer Key 2016 – 2020

The subject experts at BYJU’S Free IAS Prep have provided solved papers of UPSC prelims that will be a crucial part of the exam preparation. By solving previous years UPSC question papers found in the given links, candidates can better assess their strengths and weaknesses for the UPSC exam in an optimized and efficient manner.

UPSC Prelims 2020 Answer Key

UPSC Prelims Answer Key 2020 PDF (SET C):-Download PDF Here

UPSC Prelims Answer Key 2020 PDF GS Paper 2 CSAT (SET D):-Download PDF Here

Papers for GS1 and CSAT, aspirants can visit the linked article.

UPSC Prelims 2019 Answer Key

UPSC Prelims 2019 Answer Key Paper 1:- Download PDF Here

UPSC Prelims 2019 Answer Key Paper 2:- Download PDF Here

UPSC Prelims 2018 Answer Key

UPSC Prelims Answer Key Paper 1:- Download PDF Here

UPSC Prelims Answer Key Paper 2:- Download PDF Here

UPSC Prelims 2017 Answer Key

UPSC 2017 Prelims GS Paper I Booklet Series ‘A’:- Download PDF Here

UPSC Prelims Answer Key Paper 1:- Download PDF Here

UPSC Prelims Answer Key Paper 2:- Download PDF Here

UPSC Prelims 2016 Answer Key

UPSC Prelims Answer Key Paper 1:- Download PDF Here

UPSC Prelims Answer Key Paper 2:- Download PDF Here

How to Calculate Your UPSC Score with Answer Key

To tally their score, UPSC exam aspirants can keep the following information in mind.

1. The GS and CSAT papers are of 200 marks each
2. There are 100 question in GS and 80 question in CSAT
3. A negative marking of 0.66 and 0.833 is there for every incorrect answer in GS and CSAT papers respectively.
4. Candidates scoring above the designated cutoff marks will be eligible for UPSC Mains
5. In case the candidates’ scores find their store near the expected cutoff after tallying with the UPSC Answer Keys, then it is recommended that preparations for IAS Mains be undertaken.

Candidates can find out more about calculating score after negative marking in UPSC Prelims, by visiting the linked article.

UPSC Prelims 2022 Strategy

How difficult or easy the UPSC Prelims will be is entirely dependent on the individual candidate’s own capabilities. Regardless it is prudent to incorporate a sound strategy in order to clear the Prelims stage

The following elements must be considered when making a UPSC Prelims 2022 Strategy:

• Emphasis on current affairs into your revision plan.
• Do not have too many reading materials at han as too much information will be overwhelming to process
• Standard sources such as the Hindu Newspaper, PIB, Yojana and Kurukshetra will be useful enough especially where UPSC specific information is
• For basic concepts, NCERT books are recommended.
• Practice reducing incorrect answers as there is negative marking in UPSC Prelims.

The basic idea is to revise, make mistakes, revise better and finally make fewer mistakes in the actual Prelims exam. Candidates must review the UPSC CSE Syllabus and accordingly prepare for the upcoming examination.

To take inspiration and motivation from previous year UPSC Toppers, candidates can visit the linked article.

Aspiring candidates who wish to secure top ranks in the Civil Services Examination are advised to go through the following links: