For an ECS solution requiring high availability and fault tolerance, which node type should be prioritized?

Question

Options

• ALow-cost, single-instance nodes
• BHigh-availability configured nodes
• CNodes with the latest graphical cards
• DNodes with the most aesthetically pleasing design

• A
  5% (1)
• B
  91% (20)
• D
  5% (1)

Explanation

High-availability configured nodes (B) are the correct choice because they are specifically designed with redundancy, failover mechanisms, and resilience features that keep ECS workloads running even when individual components fail - directly satisfying both "high availability" and "fault tolerance" requirements.

• A is wrong because single-instance, low-cost nodes introduce a single point of failure; if that node goes down, the entire workload fails, which is the opposite of fault tolerance.
• C is wrong because GPU capabilities address compute performance for graphics or ML tasks, not reliability or uptime - a node with the latest GPU can still be a single point of failure.
• D is wrong because physical aesthetics have zero relevance to system architecture or reliability.

Memory tip: Associate "HA" (High Availability) with "Always Available" - whenever an exam question pairs high availability with fault tolerance, look for the answer that explicitly mentions redundancy, clustering, or HA configuration, not cost, performance specs, or appearance.

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