Microsoft Azure Architect Technologies (AZ-300) Practice Exam

What does scaling up involve in cloud services?

1. Adding more instances to a service

2. Increasing resources like CPU or memory to a single instance

3. Installing additional software on multiple machines

4. Partitioning a resource into smaller units

The correct answer is: Increasing resources like CPU or memory to a single instance

Scaling up, also known as vertical scaling, refers to the process of increasing the resources of a single instance of a service, such as adding more CPU or memory. This approach enhances the capacity of that specific instance to handle larger loads or demands without changing the overall architecture of the application. By increasing the hardware specifications of a single virtual machine or service instance, you enable it to accommodate increased performance requirements, making it particularly beneficial for applications that are not designed to run on multiple instances or require stateful sessions. The other concepts mentioned involve different scaling strategies. Adding more instances to a service indicates horizontal scaling, partitioning resources relates to breaking services down into smaller elements, and installing additional software on multiple machines generally pertains to replication or distribution rather than scaling.