Your question is SDLC and STLC Understanding. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What is your understanding of the Software Development Life Cycle (SDLC) and Software Test Life Cycle (STLC)?
Please explain the phases of each, how they relate to one another, and where QA is involved from start to finish. Keep your answer focused on practical delivery and defect prevention, not theory.