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'Test impact analysis' speeds CI by
ARunning every test on every single commit
BSkipping all tests until end of sprint
CRunning tests only on the deploy night
DRunning only tests affected by recent change
Answer & Solution
Correct answer: D. Running only tests affected by recent change
Test impact analysis maps code changes to affected tests (via coverage data) and runs only those, drastically shortening CI feedback. Tools: Microsoft Test Impact Analysis, JetBrains TeamCity, ekstazi for Java.
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