What is the main advantage of cloud computing?

• A. Cost efficiency
• B. Scalability
• C. Both cost efficiency and scalability
• D. Security

Answer: (C)

The main idea is that cloud computing combines cost efficiency with scalability. Moving to a pay-as-you-go model reduces upfront hardware purchases and ongoing maintenance, so you pay only for what you use and avoid overprovisioning. At the same time, you can rapidly adjust resources to match demand—adding or removing compute power and storage as needed—without long lead times. This elasticity keeps performance consistent during spikes and optimizes costs during lulls. Security matters in cloud environments, but it isn’t the primary advantage being tested here, whereas cost efficiency and scalability together capture the core benefit.