I believe that in a lot of the processes run by the Public Service Commission, they will actually ask that question on the poster that goes out; people can identify that way as well. So there are ways of doing it, but, as Madame Jauvin says, it may vary depending on the competitions by different departments.
Evidence of meeting #45 for Government Operations and Estimates in the 39th Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was need.
A recording is available from Parliament.