1stDibs.com Junior Java Developer interview questions

The first interview was through the phone. The interviewer asked about my work experience and technical questions. In the end he asked how I would implement a logic about how 2 elevators should work. At the second round, It was an on-site interview. I was interviewed by two people and basically, they asked technical questions and brought coding questions. One of it was discussing Fibonacci and its performance. The other one was about sorting. There was one more brain teaser coding question that I found difficult.