IAT 2027 Exam Pattern helps candidates understand the exam structure of the IISER Aptitude Test, including the number of questions, marking scheme, exam duration, subjects, and mode of examination.
For the academic session 2027-2028, the IAT Exam Pattern will be released by the exam authority in the information bulletin upon the release of the exam notification. It is highly anticipated that the IISER exam pattern 2027 will be released in the month of February 2027.
Based on the previous year's paper pattern, the IAT 2027 exam is expected to be conducted in Computer-Based Test (CBT) mode for 3 hours, comprising 60 multiple-choice questions (MCQs) from Physics, Chemistry, Mathematics, and Biology. Candidates are advised to refer to the latest IAT paper pattern to develop an effective preparation strategy and improve their chances of scoring well.
Before starting the preparation, candidates must know the exam pattern and IISER 2026 syllabus, which will help them know the types of questions, exam difficulty, and depth of the subjects in detail.
Check out the IAT 2026 negative marking scheme, exam pattern, and subject-wise question division on this SciAstra exam page.
Latest Update:
IISER 2027 Exam Pattern Highlights
Candidates taking the IISER entrance exam 2027 can check out the overview of the exam pattern from here:
Aspect | Details |
Exam Name | IISER Aptitude Test (IAT) 2027 |
Conducting Body | Any one of the IISERs |
Purpose | Entrance for UG programmes (BS/ BS-MS/BTech) |
Mode | Computer-Based Test (CBT) |
Duration | 180 minutes (3 hours) |
Language / Medium | English & Hindi |
Number of Sections | 4 (Physics, Chemistry, Mathematics, Biology) |
Number of Questions | 60 total (15 questions per subject) |
Score Range | –60 to +240 (theoretically) |
Eligibility (Subject-wise) | Candidate must have taken at least three of the four subjects (Physics, Chemistry, Biology, Mathematics) in Class XII. |
Also Read: IISER Previous Year Question Papers
What is the exam pattern of the IISER Aptitude Test (IAT)?
The IAT exam pattern provides an overview of the structure of the exam. As per the pattern, the exam is conducted in a computer-based test (CBT) mode. Multiple-choice based questions are asked in it. The total number of questions is 60.
The duration of the IAT is 3 hours. There are four sections – Physics, Chemistry, Maths and Biology – in the exam question paper.
Are there any changes in the IAT exam pattern for 2026?
There are no changes in the IAT exam pattern in 2026. The exam mode is online (CBT) and the duration is 3 hours. It has 60 questions from Physics, Chemistry, Mathematics and Biology, 15 questions in each section.
IAT Exam Pattern 2027 for PCB/PCM Students
Since the exam officials have yet to release the IISER exam pattern for the session 2027-2028, candidates for reference can check out the previous year's exam pattern from here:
Features | Details |
|---|---|
Mode of Exam | Online/CBT |
Medium of Exam | Bilingual (Hindi & English) |
Frequency of Exam | Once in a year |
Number of Sections | 4 |
Number of Questions | 60 Questions |
Types of Questions | Multiple Choice Questions (MCQ) |
IAT Total Marks | 240 Marks |
Also Read:
How many sections are there in the IAT question paper?
There are four sections in the IAT question paper:
1. Physics (15 questions, 60 marks)
2. Chemistry (15 questions, 60 marks)
3. Mathematics (15 questions, 60 marks)
4. Biology (15 questions, 60 marks)
All the questions in these sections are multiple-choice based questions (MCQs). These questions are asked from NCERT Class 11 and Class 12 PCB syllabi.
Are all four subjects (PCMB) compulsory in the IAT?
The question paper of IAT contains all four sections: Physics, Chemistry, Mathematics and Biology. But, it is not compulsory for candidates to attempt all four sections to get admission to IISERs. It is recommended to attempt all four sections to increase your overall score and chances of selection.
For admission to IIT Madras, IIT Guwahati, and IISc Bengaluru, it is compulsory to attempt Physics, Chemistry and Mathematics.
IAT Negative Marking Scheme
Candidates can check out the expected marking scheme for the correct answer and incorrect answers from here:
Subject | No of Questions | Correct Answer | Incorrect Answer |
|---|---|---|---|
Physics | 15 | +4 | -1 |
Chemistry | 15 | +4 | -1 |
Mathematics | 15 | +4 | -1 |
Biology | 15 | +4 | -1 |
Also Read: IISER Cut Off
Are all four subjects (PCMB) compulsory in the IAT?
The question paper of IAT contains all four sections: Physics, Chemistry, Mathematics and Biology. But, it is not compulsory for candidates to attempt all four sections to get admission to IISERs. It is recommended to attempt all four sections to increase your overall score and chances of selection.
For admission to IIT Madras, IIT Guwahati, and IISc Bengaluru, it is compulsory to attempt Physics, Chemistry and Mathematics.
What is the duration of the IISER Aptitude Test (IAT)?
The duration of IISER Aptitude Test (IAT) is 3 hours (80 minutes). PwD candidates having disabilities with at least 40% impairment as applicable are eligible for one hour compensatory time in the IISER Aptitude Test. Therefore, the total duration of the exam for candidates belonging to PwD Category is 4 hours.
All the candidates will have to visit the IAT exam centre allotted to them to take the exam. It will be conducted online in computer-based test (CBT) mode.
