YouTube interview questions

I was contacted about a month later after career fair, and was scheduled for a phone interview. The recruiter was quite professional. I was asked about general data structure questions like what is a hashmap, the time complexity of operations of hashmap and bst, when you prefer bst to hashmap, what is java gc. Then I wrote a small program to remove duplicate strings in a file on google doc. Then I received a call from recruiter next day telling me to prepare for an onsite interview.