What is meant by regression testing, what is retesting, what is scrum, what is agile

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Accepted Answer

Regression testing is testing the existing functionality after changes, retesting is testing the fixed defects, Scrum is an agile framework, Agile is a methodology for software development.

Regression testing ensures that changes to the software do not affect the existing functionality
Retesting is done to ensure that the defects found in the previous cycle have been fixed
Scrum is an agile framework that emphasizes teamwork, accountability, and iterative progress towards a well-defined goal
Agile is a methodology for software development that emphasizes flexibility, collaboration, and customer satisfaction
Examples of agile methodologies include Scrum, Kanban, and Extreme Programming

What is meant by regression testing, what is retesting, what is scrum, what is agile

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