You can ask a counter question: Bulk hiring for what position, whether freshers or experienced? This is how you can show your smartness.
Bulk hiring for casual or contract labor
Bulk hiring is done for casual/contract labor for construction or infrastructure development. Contractors hire people from Orissa, Bihar, UP, and Jharkhand, where individuals are in desperate need of daily jobs.
Bulk hiring for entry-level positions
Bulk hiring can also be done to recruit freshers at the entry level, such as Diploma or Graduate Engineers from Engineering Colleges and Polytechnics.
These are two facets of bulk hiring as far as I know. Otherwise, bulk hiring is possible when a new organization needs employees for a newly started manufacturing unit. In such cases, placement consultants, newspaper advertisements, and job portals are utilized to attract a large number of candidates for selection and shortlisting.
Best wishes