This answer is based on what my brother experienced during his immersion day at Krea University. 

• His immersion day was conducted via online mode in June during the 3rd round of the admission process at Krea University. 
• A day prior, the authority members of Krea organized an online meeting through Zoom to make the students who would be part of the event familiar with one another.
• The session started with a professor at Krea University giving a presentation on subjects like disproportionate development and migration. 
• The students were required to listen and pay attention to what the presenters were saying. 
• The attendees were provided with 30 minutes to compose a reflective essay about their understanding of the topic. 
• For this, the students were advised not to reuse the information mentioned in the presentation.
• For the Group discussion/Presentation portion of the immersion day, the students were provided with around 2-3 minutes to speak on the topic and present their ideas and opinions. 
• The Personal interview was enjoyed by my brother. The students were asked questions about their personal stories that they include in their application. 
• The students were asked about their academic interests and their stream in Classes 11th and 12th. 
• A week later, a 7-question proctored exam was given to the students to assess their mathematical and logical reasoning skills. 
• The test would be simple for you if your class 10 math fundamentals are clear. 

My brother thought their method of picking candidates was quite interesting and unique. He was never bored during the sessions because he learned a lot from the professors and the student debates.