An e-commerce site automatically adds server capacity before holiday traffic peaks and releases it afterward. Which cloud characteristic does this demonstrate?
A.Durability
Durability is about not losing stored data.
B.Elasticity
Correct. Scaling capacity to match demand = elasticity.
C.High availability
High availability is staying up through failures, not scaling.
D.Fault tolerance
Fault tolerance is surviving component failures.
Why this answer
Elasticity is the ability to scale resources up and down automatically to match demand — paying only for what's used at any moment. It's the defining 'grow and shrink with demand' cloud property.
Correct answer: B · Last reviewed 2026-10-26
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