Why does pytest combine parameters from multiple @pytest.mark.parametrize decorators as a Cartesian product instead of pairing parameters by index?

hard🧠 Conceptual Q10 of 15

PyTest - Parametrize

Why does pytest combine parameters from multiple @pytest.mark.parametrize decorators as a Cartesian product instead of pairing parameters by index?

ABecause pytest cannot access parameter indices.

BTo reduce the number of tests and speed up execution.

CTo test all possible combinations and increase test coverage.

DBecause pairing by index is not supported in Python decorators.

Step-by-Step Solution

Solution:

Step 1: Understand pytest's testing philosophy
pytest aims to test all possible input combinations for thoroughness.
Step 2: Cartesian product ensures full coverage
Combining parameters as Cartesian product tests every pair, not just matching indices.
Final Answer:
To test all possible combinations and increase test coverage. -> Option C
Quick Check:
Cartesian product = full parameter combination coverage [OK]

Quick Trick: Cartesian product ensures thorough testing of all combos [OK]

Common Mistakes:

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