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IISER Exam Pattern 2026, Marking Scheme

Iiser Exam Pattern 2026 is vital for BS/BS-MS admissions. The IISER Aptitude Test (IAT) 2026 is a 3-hour online exam. It features 60 Multiple Choice Questions across Physics, Chemistry, Mathematics, and Biology. Each correct answer gives 4 marks, while each incorrect answer costs 1 mark.
authorImageAmit kumar Singh3 Feb, 2026
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Iiser Exam Pattern 2026

Understanding the IISER exam pattern 2026 is crucial for all candidates. It helps in effective exam preparation. Knowing the marking scheme, number of questions, sections, exam duration, and mode of exam allows candidates to plan their strategy effectively. This knowledge supports better time management and improved performance.

IAT Pattern Overview

The IISER Aptitude Test (IAT) is conducted as a single-stage, computer-based examination. This iiser aptitude test exam pattern evaluates candidates for admission to various BS/BS-MS programs. It focuses on core science subjects.

IAT Pattern Overview

Aspect

Details

 

Mode of Exam

Online (Computer-Based Test)

Number of Stages

1

Total Number of Papers

1

Types of Questions

Multiple Choice Questions (MCQ)

Duration

180 minutes (3 hours)

Total Marks

240

Medium of Exam

English and Hindi

Negative Marking

Yes

 

Detailed Iiser Exam Pattern 2026 (Section-Wise)

The IAT 2026 consists of one objective-type paper. It covers four subjects comprehensively. This section breaks down the iiser entrance exam pattern clearly. Candidates must answer questions from all areas.

Section Pattern

The examination has four distinct sections. These sections are Physics, Chemistry, Mathematics, and Biology. Each section carries equal weight in terms of questions and marks. The IAT question paper pattern remains consistent for each subject.

  • Total Questions: 60 (15 questions per subject)

  • Total Marks: 240 (60 marks per subject)

  • Duration: 180 minutes

  • Type of Questions: Multiple Choice Questions (MCQs)

  • Subject/Sections Covered: Physics, Chemistry, Mathematics, Biology

  • Negative Marking: Yes, 1 mark deducted for each wrong answer.

Also Check: IISER Admit Card 2026

IAT Marking Scheme

IAT marking scheme is straightforward. It awards positive marks for correct responses and applies negative marking for incorrect ones. This system encourages careful answering. The iiser aptitude test marking scheme ensures fair evaluation.

IAT Marking Scheme

Scoring Aspect

Details

 

Marks for Correct Answer

+4

Marks for Incorrect Answer

-1

Marks for Unanswered Question

0

Sectional Weightage

60 marks per section (15 questions each)

 

Also Check: IISER Exam Date 2026

Important Rules Related to IAT Exam Pattern

Candidates must know specific rules about the Iiser Exam Pattern 2026. These guidelines help avoid common mistakes and ensure a smooth exam experience.

  1. The exam is available in both English and Hindi languages.

  2. Candidates must attempt all sections: Physics, Chemistry, Mathematics, and Biology.

  3. A candidate must have studied at least three of these four subjects (Physics, Chemistry, Biology, Mathematics) in Class XII.

  4. For PwD candidates (with 40% or more disability), a compensatory time of 60 minutes is provided.

  5. Eligible PwD candidates can also request a scribe facility.

  6. Simply securing a rank does not guarantee admission to an IISER.

 

IAT Exam Pattern 2026 FAQs

Q1. How many stages are included in the IAT?

A. The IAT is a single-stage examination. It consists of one computer-based test.

Q2. Is there negative marking in the exam?

A. Yes, there is negative marking. One mark is deducted for each incorrect answer in the IAT exam sections and marks.

Q3. What is the duration of each paper?

A. The total duration for the IAT is 180 minutes (3 hours).

Q4. Are all sections compulsory?

A. Yes, all four sections (Physics, Chemistry, Mathematics, and Biology) are compulsory.

Q5. What type of questions does IAT have?

A. The IAT features Multiple Choice Questions (MCQs) only.
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