Zillow Software Development Engineer Intern interview questions

I applied online and they contacted me within a week. They sent me a coding question. The question was: Write code for a trinary tree with three nodes (left or lesser value, middle or equal value, right or higher value). I submitted my response with my resume via email. Then they contacted me for a phone interview. The interviewer was very polite. He asked me questions about my resume and then technical questions about the basics of java. The technical interview was very hard. He asked questions like what are the primitive data types and what are their sizes. The differences between inheritance and reference, etc.

I initially contacted the company through a university job fair. After a week, they emailed me two coding questions (data structure, string manipulation) and asked me to write functions to solve each. Once my answers were reviewed, I was invited for an onsite interview which consisted of 3 back to back technical interviews that lasted about 1 hour each.