Unit Testing Machine Learning Code Quiz

Answers and explanations appear as you take the quiz.

1. Which assertions are appropriate for a preprocessing transformer?
   • Expected output shape, column order and known transformed values
   • Held-out accuracy on a deployment-like population
   • Recall across rare production subgroups
   • End-to-end latency under peak service load
2. Why compare a loss implementation with a hand calculation?
   • It proves the model will generalize
   • It can catch formula or reduction errors on a known example
   • It replaces training data quality checks
   • It guarantees the optimizer converges
3. What does a tiny-overfit test help detect?
   • Fairness across all subgroups
   • Reliable performance on unseen data
   • Potential training-path or gradient bugs
   • Production latency under load
4. How should tests compare floating-point outputs?
   • Skip checks for all model outputs
   • Require exact bitwise equality on every device
   • Round every value to an integer
   • Use explicit tolerances appropriate to numerical precision
5. Which check belongs in a model wrapper interface test?
   • A statistical calibration curve on a held-out set
   • One prediction per input row and clear rejection of malformed features
   • Subgroup performance estimates with confidence intervals
   • Training loss after a full retraining job
6. Why separate unit tests from model-quality evaluation?
   • Quality metrics test only syntax
   • Unit tests cannot execute Python functions
   • Code correctness does not establish statistical usefulness
   • Model validation needs no data
7. What can a finite-gradient assertion establish?
   • The model is calibrated
   • The gradients are mathematically optimal
   • The model has no bias
   • A basic gradient path exists for expected parameters
8. Where should slow full-dataset training usually be placed?
   • In a separate integration or training validation stage
   • In every tiny unit test
   • Inside a feature-name assertion
   • In a package lockfile