About Quiz Space by Unknown IITians
Quiz Space by Unknown IITians (also written QuizSpace) is a free practice site for the previous year question papers of the IIT Madras BS degree. It holds 2,224 papers — Qualifier, Quiz 1, Quiz 2, End Term and Diploma Entry Qualifier — with 47,979 questions across 80 subjects of the BS in Data Science and Applications and BS in Electronic Systems, from 2021–2026. Every paper can be read with its answer key or taken as a timed mock test on a screen laid out like the real exam.
It is run by Unknown IITians, a community of IIT Madras BS students that also publishes study videos on YouTube. Quiz Space is an independent study resource: it is not affiliated with or endorsed by IIT Madras, and it is not connected with any other practice site of a similar name.
Where the papers come from
After each exam, IIT Madras releases the question papers to students with their answer keys — the papers that show the correct options in green. Quiz Space is built from those papers. The questions, options and the options marked correct are read from the papers’ own text rather than retyped, and figures are cut from the page, so a question here reads exactly as it did in the exam hall.
Tables, code, equations and diagrams are then drawn from structured data instead of being shown as screenshots, which is why every question is searchable, readable on a phone and correct in dark mode. Where a question is only a figure, the figure is kept as it was printed.
Answers, explanations and corrections
The answer shown for each question is the one in the official answer key. Mock tests are marked against it on the server; written and programming answers are never auto-marked. Teachers add worked explanations and video solutions to the questions over time.
If an answer or a question looks wrong, use Report a problem on the question in any mock test — every report is read and the paper is fixed for everyone. You can also write to desk@unknowniitians.com.