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IISER Answer Key 2026: The Indian Institutes of Science Education and Research has released IISER IAT 2026 response sheet and answer key challenge window on June 9, 2026. The IISER IAT answer key 2026 challenge window link has been updated on the official website, iiseradmission.in. Aspirants can challenge the IISER IAT answer key 2026 from June 9 to 13, 2026. The provisional IISER IAT 2026 answer key was released on June 7, 2026. They can simply download it without any login after clicking on the IISER 2026 answer key link. Candidates can use the provisional answer key, along with the response sheet, OMR, and question paper, to verify their answers and estimate their probable scores. The IISER exam was held on June 7.
Direct Link for IISER Answer Key 2026 Challenge Window
The answer key helps students estimate their scores and evaluate their performance before the declaration of results. After reviewing all objections, the final IISER Answer Key 2026 will be published and used for preparing the result and merit list. Read more about the IISER IAT 2026 answer key below.
The authority has announced the IISER answer key 2026 release date on the official website. Candidates can check the IISER answer key dates below.
| Events | Important Dates |
|---|---|
IISER exam date 2026 | June 7, 2026 |
IISER Answer Key 2026 release date | June 7, 2026 |
Availability of IAT 2026 response sheet or OMR and question paper and answer key challenge start date | June 9, 2026 |
Last date to objection against the answer key of IISER 2026 | June 13, 2026 |
IISER 2026 final answer key date | June 2026 |
IISER 2026 result date | June 2026 |
The IISER aptitude test answer key pdf has been updated on June 7, 2026 on the official website. The authorities will first release the provisional answer and then the IISER final answer key. Candidates can download the IISER answer key in a few simple steps. Follow the steps mentioned below to download the IAT exam answer key 2026.
Go to the IISER 2026 official website, iiseradmission.in
Click on the ‘IISER answer key 2026” link.
The answer key of IISER 2026 will be displayed.
Download the answer key and verify the answers.
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The authority allowed the candidates to challenge the provisional answer key of IISER 2026. Candidates who have genuine issues with the mentioned key can challenge the IISER answer key by providing supporting documents. Below are the steps to challenge the IISER answer key.
Visit the IISER official website, iiseradmission.in
Click on the “Raise Objections” link.
Login using the application number and password.
IISER answer key PDF will be displayed on the screen.
Select the question Id and upload supporting documents.
Pay the processing fee and submit it.
Candidates can follow the below steps to calculate the the scores in IISER aptitude test,
First, calculate how many answers are correct.
Multiply all the correct answers by 3. For example, if X presents the correct answer marks, there are 100 correct answers, so that will fetch 300 marks.
Now, calculate how many answers are wrong.
Now, you have to deduct the marks for wrong answers. For example, if Y presents wrong answer marks, there are 20 wrong answers, so 20 marks will be deducted).
Now, subtract correct answer marks from wrong answer marks. For example, X-Y gives you (300-20 = 280), which is the actual score you have secured in the examinations.
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| Particulars | Details |
|---|---|
Total Number of Questions | 60 |
Marks allotted for the correct answer | 3 Marks will be rewarded |
Negative Marking | 1 Mark |
Marking for unattempted question | 0 Mark |
Frequently Asked Questions (FAQs)
The IISER answer key 2026 has been released on June 7, 2026.
Candidates can download the final answer key of IISER 2026 on the official website – iiseradmission.in.
Candidates will be able to raise objection to the IISER IAT 2026 answer key through official website.
Yes, there will be a negative mark of 1 in the IISER exam.
On Question asked by student community
Hi! To prepare for the IISER Aptitude Test, you need to understand the syllabus, exam pattern, and follow a proper preparation strategy. Click on the links below to learn more.
You can find IISER Aptitude Test (IAT) previous year question papers and answer keys on educational websites like Careers 360. They provide with the official question papers as well as the answer key.
Read more at
https://engineering.careers360.com/articles/iiser-2025-question-paper-solutions
Hello,
If you have uploaded the old EWS certificate (2024–2025) instead of the new one (2025–2026), there is a chance that it may not be accepted, as the IISER notification clearly asks for the valid and updated EWS certificate for the year 2025–2026.
Right now, if the correction window is
Hello,
If you have selected OBC-NCL category and uploaded a Central OBC-NCL certificate , then there is no issue .
IISER accepts Central OBC-NCL certificate , as long as it is valid and issued by a competent authority. Just make sure the certificate is:
Issued within one year from the
Hello aspirant,
Applicants must take either the JEE Main or JEE Advanced exam in order to be considered for admission to the best engineering institutes in India. JEE Advanced and Main are administered by separate bodies. Because the JEE Advanced exam is more difficult than the JEE Main exam, candidates
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