Name the methods of recruitment in the following cases: ltbr (i) A company gets applications on and off even without declaring any vacancy. However, as and when the vacancy arises, the company makes use of such applications.
(ii) Casual vacancies of unskilled or semi-skilled jobs when there is a rush of orther of when some permanent workers are absent.
(iii) Recruitment by which most of the senior positions of the industry as well as commerce are filled.