Microsoft Azure Fundamentals (AZ-900)Describe cloud conceptsEasy
A small startup is developing a new mobile application and expects rapid, unpredictable user growth. They need a computing environment that can scale resources up and down automatically based on demand, and they want to pay only for the resources consumed. Which cloud characteristic is most beneficial for this scenario?
- ADisaster Recovery
- BElasticity
- CGeographic Distribution
- DHigh Availability
Show answer & explanationAnswer & explanation
Correct answer: B. Elasticity
Elasticity allows cloud resources to be automatically scaled up or down based on current demand, which is crucial for unpredictable user growth and cost-efficiency in a startup scenario. This characteristic ensures resources are always available without over-provisioning.
Why the other options are wrong
- A. Disaster Recovery focuses on restoring operations after a major incident, not dynamic resource scaling.
- C. Geographic Distribution spreads resources across locations for latency or compliance, not primary scaling on demand.
- D. High Availability ensures systems remain operational despite failures, but doesn't directly address scaling with demand.
Elasticity
The ability of a cloud system to automatically and dynamically adjust its computing resources (e.g., CPU, RAM, storage) to meet fluctuating demand, without human intervention.
- Scales resources up or down automatically.
- Optimizes cost by paying only for what's used.
- Crucial for unpredictable workloads.
- Often confused with scalability, which can be manual.
Memory trick: Cloud services stretch like an elastic band, always fitting the demand.