A stateless web tier compiles cleanly on ARM64. Which change most improves price-performance with zero app redesign?
A.Switch to larger x86 instance types
Bigger x86 raises cost, not price-performance.
B.Move to AWS Graviton-based instance families
Correct — the price-performance play AWS itself promotes for portable workloads.
C.Purchase Convertible Reserved Instances
Convertible RIs discount commitment, not compute efficiency — savings come after the architecture choice.
D.Add an ElastiCache layer
Caching may cut load but adds cost and complexity — unrelated to compute price-performance.
Why this answer
Graviton (ARM-based) instances deliver ~20% better price-performance than comparable x86 families — for portable workloads (containers, managed runtimes, compiled-for-ARM code) it's usually a drop-in instance-type change.
Correct answer: B · Last reviewed 2026-11-01
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