The Indian Institutes of Science Education and Research (IISER) have published the provisional answer key for the IISER Aptitude Test (IAT) 2026 on their official website, iiseradmission.in. The test took place on June 7, 2026, in a single shift from 9 AM to 12 PM. This provisional answer key allows candidates to estimate their scores prior to the official results. Candidates can access the answer key by navigating to the IISER admissions website and selecting the appropriate link for either the English or Hindi version of the key. Additionally, the response sheets for candidates will be available on June 9, 2026, along with an objection window for those who wish to contest any discrepancies found in the answer key. All objections will be reviewed by the examination authorities before the final answer key is compiled. Candidates are encouraged to download the provisional answer key promptly and monitor the official website for updates regarding the response sheets and objection process.