I had three rounds of interviews in a single day for this interaction design internship. The first round lasted about 1 hour, a senior designer asked some questions about my background and skillsets and let me have a 30-minute portfolio walkthrough. At the end she asked my preferences of the project type (design for enterprise or for customer). Then one hour later I got a phone call from the design lead, he also asked me about my background and let me talk briefly about one project, this round lasted about 20 minutes. Then 2 hours later I got a phone call from HR, she asked me some behavioral questions and told me I was accepted.