N10-009 Question #247: Real Exam Question with Answer & Explanation

Question

Cloud computing has the capability to meet increased and decreased demands for computing infrastructure for a short period of time. Which of the following best describes this characteristic?

Options

• AEfficiency
• BElasticity
• CMultitenancy
• DScalability

Explanation

Elasticity in cloud computing refers to the capability to automatically and rapidly scale computing resources up or down to meet fluctuating demand for short periods.

Common mistakes.

• A. Efficiency refers to performing tasks with the least waste of time and effort, which is a general benefit of cloud computing but not the specific characteristic of meeting fluctuating demand.
• C. Multitenancy is a cloud characteristic where multiple customers share the same underlying infrastructure while keeping their data isolated, which is unrelated to adapting to demand changes.
• D. Scalability is the ability of a system to handle a growing amount of work by adding resources, but elasticity specifically implies automated and rapid scaling to meet both increases and decreases in demand for short periods, distinguishing it from general scalability.

Concept tested. Cloud computing elasticity characteristic

Reference. https://learn.microsoft.com/en-us/azure/architecture/guide/design-principles/scalability

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