Your question is OWASP Top 10 and Mitigations. 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).
Walk me through the OWASP Top 10 vulnerabilities and explain how you would mitigate SQL injection or Cross-Site Scripting (XSS). Explain the underlying attack paths, the controls you would implement in application code and infrastructure, and how you would verify those controls through testing and monitoring.