Final answer:
The assertion that ServiceNow uses a single-instance, multiple tenant architecture is incorrect. ServiceNow employs a multi-instance architecture, providing separate and isolated environments for each customer.
Step-by-step explanation:
The statement that ServiceNow is a single-instance, multiple tenant architecture is false. ServiceNow operates on a multi-instance architecture. This means that each customer has their own separate instance, which includes the database and application layer. This is in contrast to a multi-tenant architecture where multiple customers (tenants) share the same instance with their data stored in separate schemas but sharing the same database and application infrastructure. ServiceNow's multi-instance architecture ensures that customers have their own individual and isolated environment, which can be customized and scaled according to their specific needs without being affected by the usage patterns of other tenants.