73What is survival analysis, and why can't you just use regression for time-to-event?▼hardAmazonGoogleMicrosoft1 replies◆ premiumTime-to-event problems (churn, failure, conversion timing) hide a twist that quietly biases plain regression. The signal is naming that twist and reaching for the right framing. Here is the answer.Open full answer →
58Design a customer churn prediction system.▼mediumAmazonNetflixMicrosoft1 replies◆ premiumA high-AUC churn model that changes no behavior is worthless. The strong answer nails the label definition, picks classification vs survival deliberately, and is judged on retention uplift, not accuracy.Open full answer →
52A key customer is about to churn. Walk me through how you would try to save the account.▼hardSalesforceDatabricksSnowflake2 replies◆ premiumSaving a churning account is diagnosis under pressure: find the real reason, fix what you can, and earn back trust with action. Interviewers want a method, not a discount. Here is the move.Open full answer →