Assess graduate students' ability to analyze socio-technical trade-offs in implementing digital contact tracing for infectious disease control. The quiz will test understanding of key technical architectures (centralized vs decentralized, Bluetooth vs GPS), epidemiological effectiveness and metrics, privacy, legal and ethical constraints, equity and accessibility, adoption and behavioral factors, and governance/interoperability. Questions will require evaluation of case studies, comparison of policy and design options, identification of risks and mitigation strategies, and formulation of evidence-based recommendations for deployment and evaluation.