Final answer:
In the Salesforce multitenant environment, customers share the same code base but have their own database. Customizations are specified as metadata, making upgrades easy. Automatic upgrades are applied according to the Salesforce release schedule.
Step-by-step explanation:
The subject of this question is Computers and Technology at the college level.
In the Salesforce multitenant environment, all customers share the same code base, but have their own database. This means that the underlying system and infrastructure are the same for all customers, but each customer's data is stored separately.
All customizations in Salesforce are specified as metadata, which includes configuration settings but not code. This makes it easier to manage and upgrade customizations, as they can be applied universally to all customers.
Automatic upgrades are applied during the year according to the Salesforce release schedule. This ensures that all customers have access to the latest features and improvements without requiring individual upgrades.