CAP theorem implications for MDC3 system design?

• A. Systems Must Always Prioritize Consistency Over Availability And Partition Tolerance
• B. CAP Theorem States A Distributed System Must Choose Between Consistency, Availability, And Partition Tolerance; Trade-Offs Based On Requirements
• C. Partition Tolerance Is Not Important
• D. Security Is Always Primary

Answer: (B)

The main idea being tested is how a distributed system handles real-world network failures while keeping data correct and available. The CAP theorem says you can’t have all three at once when a partition happens: you must trade off consistency or availability, with partition tolerance assumed because partitions can and do occur in distributed deployments. In practice, you design MDC3 to favor one of two paths based on what matters most for your needs. If maintaining up-to-date, strictly correct data across all nodes is essential, you lean toward stronger consistency and accept that some operations may be blocked during a partition to keep data in sync. This often involves using consensus protocols so a majority of nodes agree before a write is considered committed, which can reduce availability during disruptions. On the other hand, if the system must stay responsive even when some nodes can’t be reached, you tolerate temporary inconsistency and rely on eventual convergence later, with mechanisms like read repairs or conflict resolution to reconcile data once partitions heal. Understanding this helps you shape MDC3’s replication strategy, quorum rules, and conflict-handling policies to meet the required balance of latency, uptime, and correctness.