Your question is Security in Applications and Systems. 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).
How do you ensure security in your applications and systems?
Explain a practical approach for securing software throughout its lifecycle, from design and implementation through deployment and incident response. Cover the threats you consider, the controls you would implement, and how you verify those controls are effective. Use specific technologies where relevant, and distinguish preventive controls from detection and recovery.