In a corporation where compute utilization spikes several times a year, the Chief Information Officer (CIO) has requested a cost-effective architecture to handle the variable capacity demand. Which…

Question

Options

• AElasticity
• BScalability
• CHigh availability
• DRedundancy

• A
  94% (49)
• C
  2% (1)
• D
  4% (2)

Explanation

Elasticity is correct because it refers to a system's ability to automatically scale resources up and down in response to fluctuating demand, then release those resources when no longer needed - making it highly cost-effective for workloads with unpredictable or seasonal spikes.

Scalability (B) is incorrect because while it describes a system's ability to grow to handle increased load, it typically implies a one-directional expansion and does not emphasize automatically shrinking back down to save costs. High availability (C) is about ensuring a system remains operational with minimal downtime, which has nothing to do with managing variable capacity demand. Redundancy (D) refers to having duplicate components as a failover mechanism to prevent single points of failure - again, unrelated to cost-efficient capacity management.

Memory Tip: Think of elasticity like a rubber band - it stretches and snaps back. If a question mentions both scaling up AND saving costs by scaling down, the answer is always elasticity.

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