[Solved] Why is smoke testing considered a subset of regression testing? - Ans: Because smoke testing checks only critical functionalities, not all features | Testing Fundamentals

Testing Fundamentals - Testing Types and Levels

Why is smoke testing considered a subset of regression testing?

ABecause smoke testing is done after full regression testing

BBecause smoke testing tests performance under load

CBecause smoke testing checks only critical functionalities, not all features

DBecause smoke testing focuses on UI design only

Step-by-Step Solution

Solution:

Step 1: Understand regression testing scope
Regression testing verifies that recent changes did not break existing features.
Step 2: Understand smoke testing scope
Smoke testing quickly checks only critical functionalities to decide if build is stable.
Step 3: Relation between smoke and regression
Smoke testing is a small, initial subset of regression testing focusing on main features.
Final Answer:
Because smoke testing checks only critical functionalities, not all features -> Option C
Quick Check:
Smoke test = subset of regression for critical features [OK]

Quick Trick: Smoke test is quick check inside regression [OK]

Common Mistakes:

MISTAKES

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Why is smoke testing considered a subset of regression testing?