I was referred from an employee for an interview. A recuter contacted me by mail and asked when I would be free for an interview in the next three weeks. Then they scheduled with the team.
The interview was one hour long and consisted of three parts. First some questions about a project I was proud of. They asked about my part in the project and how I solved problems with team mates. Also some followup questions.
In the second part I got a link for an online texteditor with syntax higlighting. I was asked to solve a easy programming question. At first I had to explain the algorithm I wanted to use and then programm it. Afterwards I had to compute the complexity and optimise my solution. Also some followup questions.
In the end I could ask some questions about the internship.