Microsoft Intern interview questions

Sent out my resume through campus recruiter. Got an email a week later to schedule an interview. Interviewed on university campus. Interviewer was very friendly and asked about my resume for about 20 minutes. One coding questing at the very end.

Got recommended to recruiter and contacted shortly. Filled in a form that had technical questions such as create a method to make sure that the parenthesis in an expression are well matched. Afterwards got an online interview with more technical questions. First I had to create a method that would return the first common parent of two given nodes in a binary tree. Then a testing question. Given a laptop that cannot access a website that a desktop can figure out what is wrong with the laptop. And finally give a method to shuffle cards. The interviewer was very nice in the beginning but in the end he seemed to be frustrated which seemed demotivating since he was expecting a very specific answer.