Which permissions do default roles have?

Default roles are:
– Student – User with this role is typically only allowed to complete assignments.
– Instructor – The primary role is to manage assignments, users and groups, and the testing process.
– Proctor – User with this role can typically only monitor students’ progress on tests and supervise them in real-time.
– Administrator – The primary role of this account is to manage system settings and monitor system performances.

For more information on how to assign default user roles and create new ones, please see this link.
Also, for information on how the application looks like from each role perspective, please see the links below:
– Student 
– Instructor 
– Proctor 
– Administrator