GCP Associate Cloud Engineer Practice Question

Auto mode VPC networks always create one subnet per region at creation time and automatically add new subnets whenever Google Cloud launches a new region, so they cannot guarantee that only the two required subnets will exist. The most straightforward way to meet the requirement is to create the VPC in custom mode, which starts with no subnets, and then explicitly create just the two needed subnets, each with its region and IP CIDR range. Deleting subnets from an auto-mode network or trying to rename/resize default subnets is error-prone and still would not stop future automatic subnet creation. Therefore, the sequence that builds a custom-mode network and then adds the two subnets is the only correct solution.