Grey box testing is the technique to debug and evaluate the vulnerabilities of software applications. In such a method, the testers have only limited knowledge of the internal structure or components of the software applications under test.
In the Software Development Life Cycle (SDLC), testing is the crucial phase that verifies the quality of the software application. In this development cycle, different software testing techniques like black box and white box testing are used to evaluate the performance and function of software applications and ensure their quality.