Meta Software Developer interview questions

Phone interview after refer from employee, the process went well, and the interviewer is respect and patient. Details will be given to help understand questions, no blablabla, just coding questions, interviewer will be asked for Big-O analysis

Get contact from their recruiter. And take a 45 minutes interview with them. two coding question. Can't tell details due to NDA. One is about string match, and another is about binary tree. From what I observe, efficiency really matters. And no need to do the perfect, but describe your idea clearly and keep conversation is important.