Microsoft Security Engineer Interview Questions

I would start from the assumption that no user, device, or network segment is inherently trusted. Then I would require explicit verification, least privilege access, and continuous risk checks across identity, endpoints, and services. The goal is to reduce implicit trust and make every access decision measurable and enforceable.

A vulnerability is a weakness, a threat is something that can exploit that weakness, and risk is the potential impact and likelihood of harm. I would explain that all three are related but not identical, and that good security work prioritizes the highest-risk combinations first. That shows I can reason clearly about what actually needs mitigation.

I would look at the process name, parent process, command line, network activity, file location, and any related event logs. Then I would compare it against known-good baselines and look for persistence or lateral movement indicators. The main goal is to quickly separate benign behavior from likely compromise.

I would mention techniques like scheduled tasks, registry run keys, services, startup folders, and other autorun mechanisms. A strong answer shows awareness that persistence is designed to survive reboot and maintain attacker access. I would also note that persistence often leaves traces in logs, autoruns, and system changes.

A firewall controls allowed network traffic based on rules that match ports, protocols, addresses, or application context. I would configure it using least privilege, allowing only the flows that are explicitly needed and denying everything else by default. Good firewall design reduces exposure and makes traffic paths easier to reason about.