I was referred by a friend of mine and was called by a recruiter to set up an interview.

My first interview was 1.5 hours with two engineers who asked about my experience and specifically about a project I worked on lately. They then gave me two questions in which I had to find a solution under the restrictions they provided and write code.

Two days later, I was called to say I passed and to schedule another interview.

My second interview was also 1.5 hours with a group manager who gave me a mini spec and asked me to find a solution and write code for it. Three days later, I got a call that I did not pass.

Find the length of a linked list (with various restrictions and edge cases).