Digital examination systems are increasingly used to support large-scale assessments in higher education. Unlike general educational platforms, examination systems operate under strict time constraints, high participant concurrency, and significant psychological pressure, making them inherently critical systems. In such contexts, technical failures do not merely cause operational disruptions but may trigger panic among examinees, undermine assessment fairness, and erode institutional trust. This study aims to critically examine the extent to which digital examination systems differ from non-critical educational systems in terms of risk, reliability, and failure impact. Using a qualitative conceptual approach and critical literature review, this paper synthesizes prior studies on online assessment, remote proctoring, academic integrity, student experience, and trust in digital examinations. The analysis highlights that examination systems exhibit characteristics of time-critical and high-stakes socio-technical systems, where even minor technical disruptions can escalate into system-wide failure cascades affecting legitimacy and credibility of assessment outcomes. The findings suggest that treating examination systems as ordinary educational technologies underestimates their systemic risk and may lead to inadequate design, implementation, and policy decisions. This study contributes conceptually by framing digital examination platforms as critical systems that require higher reliability, fail-safe mechanisms, and trust-oriented design considerations. Practically, the findings provide insights for educational institutions to adopt more robust technological and governance strategies to ensure the stability, fairness, and sustainability of digital examinations.