From I interviewed at five top companies in Silicon Valley in five days, and luckily got five job offers by Xiaohan Zeng

Make sure you understand basic concepts such as bias-variance trade-off, overfitting, gradient descent, L1/L2 regularization，Bayes Theorem，bagging/boosting，collaborative filtering，dimension reduction, etc. Familiarize yourself with common formulas such as Bayes Theorem and the derivation of popular…