System design questions are a common part of technical interviews, especially for software engineering roles. These questions assess a candidate's ability to design scalable and efficient systems. They often involve creating architectures for applications, databases, or services, considering factors like performance, reliability, and maintainability. In these interviews, candidates might be asked to design systems like a social media platform, a file storage service, or a real-time chat application. The goal is to evaluate how well candidates can think through complex problems, make trade-offs, and communicate their design choices effectively.