Web service that provides resizable compute capacity in the cloud?

• A. Amazon EC2
• B. Alexa for Business
• C. AWS Batch
• D. AWS Budgets

Answer: (A)

The main idea being tested is elastic, on-demand compute capacity in the cloud delivered as scalable virtual servers. Amazon EC2 provides exactly that: resizable compute capacity in the form of instances. You can choose from various instance types with different CPU, memory, and network capabilities, launch them when you need power, and scale them up or down as demand changes. Auto Scaling allows automatic adjustment of the number of instances to match traffic, ensuring your web service stays responsive while optimizing costs. The other options don’t provide persistent, scalable compute resources for hosting a web service: Alexa for Business is a voice-enabled collaboration tool, AWS Batch runs batch processing jobs rather than continuously available web servers, and AWS Budgets is a cost-management service.