What happens if a user’s profile does not have permission to access a certain object?

When a user’s profile does not have permission to access a certain object, that user has no access to that object at all. This means the user will not be able to view, create, edit, or delete records associated with that object. Permissions defined in the user’s profile strictly determine object-level access, and if no permissions are granted, that object is effectively invisible to the user.

While other options might suggest certain levels of access, they do not accurately reflect how Salesforce manages object permissions. For instance, the suggestion that a user can view the object in reports or has limited viewing capabilities contradicts the foundational permission structure within Salesforce, which prevents interaction with an object entirely if access is denied. Sharing rules also pertain to record-level access for users who already have object-level access, thus not applicable in this context.