I gave my written test for MSc. Cognitive Science was offered at IIT Gandhinagar some time back.
The written test is the same for everyone and contains 4 Comprehensive-type questions and 1 question on Data Interpretation. The total marks for the test are 25 and the duration for the test is 1 hour. Solve some random comprehensive-type questions from the internet to prepare for your written exam.
Passages can come from topics such as - Pathophysiology of neurodegenerative disorders, case studies of behavioral experiments using VR/AR, the latest advancements in AI and Philosophy, etc.
The questions are designed in a manner that can be interpreted by everyone. Keep calm and you will surely qualify for the written test for this program at IIT Gandhinagar.