Some API endpoints can take both path and query parameters. (Path parameters can be thought of as "equals" criteria and query parameters as filtering criteria.) Including the separators for both kinds of parameter together with no path parameter between them (e.g. "/?") is confusing and should not be done.
Explanation:.
A path parameter follows immediately after the resource it refers to separated by a forward slash ("/"). For example, in "https://gateway.api.berkeley.edu/hr/v3/employees/10146454" "employees" is the resource and "10146454" is the employee-id path...