IISER Aptitude Test (IAT) is an Indian computer-based test for admission to the various undergraduate programs offered by the seven IISERs, along with IISc Bangalore and IIT Madras.

IAT is conducted as a computer based test in the centers across India.

Total time for answering the test is 3 hours.

Questions are of multiple choice type with only one correct answer.

The total marks obtained by a candidate out of 240 is considered for preparing the Rank List.