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Phone screen. Absolutely absurd questions to ask a programmer. In the rare case you'd need to know something like the port number for SMTP, which I can't say I ever have, you'd just Google it. I don't understand what they're doing or why they think

In the first technical interview round, they asked about the pros and cons of different caching methods. There was a LeetCode medium question about undirected graphs and finding connected groups. They also asked about the difference between a thread

1st round - 5 mins intro, 25 mins conceptual questions, 25 mins coding, 5 mins outro. Coding was mostly about data structures and algorithms, and conceptual questions were basic machine learning algorithms.