Which of the following best describes the main objective of regression testing in data science workflows?

easy🧠 Conceptual Q1 of Q15

Testing Fundamentals - Testing Types and Levels

ATo improve the accuracy of a predictive model by retraining it

BTo verify that recent code changes have not adversely affected existing model outputs

CTo test the performance speed of a new algorithm implementation

DTo validate the data preprocessing steps before model training

Step-by-Step Solution

Solution:

Step 1: Understand regression testing purpose
Regression testing ensures that new changes do not break or alter existing functionality or outputs.
Step 2: Analyze options
To verify that recent code changes have not adversely affected existing model outputs correctly states the goal of verifying that recent changes do not negatively impact existing outputs. Options B, C, and D describe other testing or development activities unrelated to regression testing.
Final Answer:
To verify that recent code changes have not adversely affected existing model outputs -> Option B
Quick Check:
Regression testing focuses on stability after changes [OK]

Quick Trick: Regression testing checks for unintended output changes [OK]

Common Mistakes:

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