SOFTWARE ENGINEERING

Detailed explanation-1: -The developer performs unit testing. That’s because the unit test provides feedback on whether or not developers have developed new features correctly.

Detailed explanation-2: -With unit testing, developers can have more control over their individual code block quality before integrating different components and then sent for regression testing. Also, it is easier to identify and rectify mistakes or defects at the code level.

Detailed explanation-3: -Test cases are typically written by members of the quality assurance (QA) team or the testing team and can be used as step-by-step instructions for each system test. Testing begins once the development team has finished a system feature or set of features.