SDLC/STLC lifecycle explain. What do you understand by Agile development.Some theory concept of Software Testing subject.

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SDLC/STLC are software development/testing lifecycles. Agile is a development methodology focused on iterative and incremental development.

SDLC (Software Development Life Cycle) is a process used to design, develop, and test software. It includes phases like planning, analysis, design, implementation, and maintenance.
STLC (Software Testing Life Cycle) is a process used to test software. It includes phases like test planning, test design, test execution, and test closure.
Agile development is a methodology that emphasizes iterative and incremental development. It focuses on delivering working software in short iterations and adapting to change.
Agile methodologies include Scrum, Kanban, and Extreme Programming (XP).
In Agile, testing is integrated throughout the development process, with continuous feedback and collaboration between developers and testers.

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