What are the activities performed in test design and test execution?

Test Design: Based on the requirement analysis, test conditions are written first and an approval is obtained from the QA lead. Then the detailed test cases are written which are reviewed by the QA lead. Also, test environment setup is completed in this.

Test Execution: This phase of STLC involves the execution of test cases. If any test case is failed, it is reported to the developer for fixing it. Once the developer fixes the bug, the test case will be executed again to retest the functionality.