Jane Street Quant interview questions

A phone call, about 40 mins long, there was no formalities only vet technical questions. Around about 4 questions, with extensions to them if you completed them quickly. You were expected to talk through your thought process and methods for solving these questions.

Zoom Interview with only audio. We had to think aloud while solving the questions. Questions were from estimation, probability and games. Lots of follow up questions were asked. It was difficult.