Some of my friends attended UIET Chandigarh and UIET Hoshirpur, so I have some information regarding the placement at these institutes.
As both the colleges UIET Chandigarh and UIET Hoshiarpur are part of Punjab university, the students visit the Punjab University for placements. Companies do visits there. Sometimes students of UIET Hoshiarpur have to visit UIET Chandigarh for placements. The students of both colleges are given different slots.
But both the colleges have their own placement cells. The placement depends on these placement cells. The companies like Infosys and Sufi visit both colleges. In such cases, the placements take place on the same date and at the same time.
Hope this clears your doubts.