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What is the main purpose of regression testing in data science projects?

easy📝 Conceptual Q11 of 15
Testing Fundamentals - Testing Types and Levels

What is the main purpose of regression testing in data science projects?

ATo check that new changes do not break existing results
BTo create new models from scratch
CTo collect new data for training
DTo visualize data trends
Step-by-Step Solution
Solution:

  1. Step 1: Understand regression testing goal

    Regression testing is about verifying that recent changes do not cause errors in existing functionality.

  2. Step 2: Match purpose with options

    Only To check that new changes do not break existing results describes this goal correctly, others describe unrelated tasks.

  3. Final Answer:

    To check that new changes do not break existing results -> Option A

  4. Quick Check:

    Regression testing = check no breakage [OK]
Quick Trick: Regression testing ensures old results still work after changes [OK]
Common Mistakes:
  • Confusing regression testing with model building
  • Thinking it collects new data
  • Assuming it is for data visualization

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