What is bug life cycle? What is santy and smoke testing? What is regression testing and re testing?

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Bug life cycle is the process of a bug from identification to resolution. Sanity and smoke testing are initial tests to check basic functionality. Regression testing ensures new code doesn't break existing features. Re-testing is testing a bug fix.

Bug life cycle involves identification, reporting, prioritization, fixing, retesting, and closing of a bug.
Sanity testing is a narrow regression test to ensure basic functionality works after changes.
Smoke testing is a broader test to check if the software build is stable enough for further testing.
Regression testing ensures that new code changes do not adversely affect existing features.
Re-testing is done to confirm that a specific bug has been fixed after the developer has made changes.

What is bug life cycle? What is santy and smoke testing? What is regression testing and re testing?

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