Memory Optimized — AWS Solutions Architect Associate Practice Questions

Memory-optimized EC2 instances are designed for workloads that process large datasets entirely in RAM, such as in-memory databases (Redis, Memcached), real-time big data analytics, and high-performance computing applications. The exam expects you to identify when a workload's bottleneck is RAM rather than CPU or I/O and to select the R, X, or High Memory (U) instance families accordingly. These instances provide a high memory-to-vCPU ratio compared to general-purpose families, which matters for right-sizing and cost-optimization scenarios. Questions often contrast memory-optimized instances against compute-optimized or general-purpose options to test your ability to match resource profiles to workload requirements.

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