It boggles my mind too. I've conducted a fair number of interviews both phone and in-person, and I don't think I've ever encountered anyone remotely that bad.

It boggles my mind too. I've conducted a fair number of interviews both phone and in-person, and I don't think I've ever encountered anyone remotely that bad. I work in a non-tech company (bank), so I assume the general caliber of candidates is quite lower than what a bonafide Silicon Valley style tech company would see. Would the typical candidate I interview be able to pass a DS&A leetcode medium or hard, getting the superoptimal solution on the first try within <40 minutes? Probably not. Maybe most of them wouldn't be able to do so on a harder leetcode easy problem either. But most are still able to code up an acceptable solution to a more "realistic" in-person coding exercise we give them.