Y

Machine learning · Intermediate · 6 h

Features, leakage and cross-validation

Build feature pipelines, avoid data leakage and estimate performance with cross-validation.

Why employers care: Leakage makes models look brilliant in notebooks and useless in production. Mid-level roles expect you to spot it.

In the roadmaps for: Data Scientist, AI/ML Engineer

Lessons, in order

  1. Data leakage and cross-validationOne column turns a 0.80 model into a 0.94 fantasy. Learn to spot leakage and estimate performance you can trust.3 min