Domain Driven Design (DDD) is a software development methodology that emphasizes collaboration between technical and domain experts, focusing on understanding the problem domain to inform software design decisions. In technical interviews, questions about DDD assess a candidate’s ability to link business requirements to object-oriented design, their understanding of Ubiquitous Language, and their ability to implement complex software patterns. Knowledge of DDD can prove instrumental in creating scalable, maintainable software that accurately reflects business needs.