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Level · 10 challengesLive

Advanced

Ten harder challenges — 5 ML, 5 AI — on the problems real datasets and real models actually throw.

  1. Challenge 1Handle class imbalanceAdvancedUse class_weight='balanced' to recover the rare class.~20 min · 1 blanks→
  2. Challenge 2Reduce dimensions with PCAAdvancedProject to 2 principal components and measure retained variance.~20 min · 1 blanks→
  3. Challenge 3Cluster without labelsAdvancedFind natural groups with KMeans.~20 min · 1 blanks→
  4. Challenge 4Diagnose overfittingAdvancedMeasure the train-test accuracy gap.~20 min · 1 blanks→
  5. Challenge 5Tune hyperparametersAdvancedGrid-search the regularization strength with cross-validation.~20 min · 1 blanks→
  6. Challenge 6Build a tool-using agentAdvancedMake the model route a math question to a calculator tool.~20 min · 1 blanks→
  7. Challenge 7LLM as judgeAdvancedUse the model to grade another answer.~20 min · 1 blanks→
  8. Challenge 8Triage to structured JSONAdvancedClassify a ticket into JSON with priority and category.~20 min · 1 blanks→
  9. Challenge 9Retrieval-augmented answerAdvancedRetrieve the right doc, then have the model answer from it (RAG).~20 min · 1 blanks→
  10. Challenge 10Content guardrailAdvancedBuild a moderation classifier that blocks unsafe messages.~20 min · 1 blanks→