Intel Corporation Process Engineer interview questions

I had a friend pass my resume to the hiring manager in his group. Got a call withing a few days itself for a phone interview. The phone interview was very casual and he was more interested in what I had done during my graduate work and what sort of job I could expect at Intel. Overall, it was more of a conversation rather than an interview. At the end of which he told me that he was interested in inviting me over for an on-site interview. I have set up the on-site and am currently waiting for it to happen.

Started with a phone screen and was called onsite the following week. All day 1:1 casual interviews that seemed more like conversations. Some technical questions came up, just need to work through your thoughts and not necessarily jump to an answer.