Hi , What I have understood that it would basically yet another leetcode ( a coding platform ) or hackerearth ( another platform for proctored platform , I have to take test on this platform for my recruitment ) , correct me I have deviated from your point :) .
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And all the very best .
Here's the source: https://zety.com/blog/hr-statistics?gclid=Cj0KCQjw45_bBRD_ARIsAJ6wUXSoSVkE6EfT7nnLf7_1TMihZCBRze7VZCI_aM1OW1iL0KA03XhDmu8aAhLrEALw_wcB
So, I did not have any preciser info, sorry.
Read these books:
The Rich Recruiter https://www.amazon.co.uk/dp/1519364474/ref=cm_sw_r_cp_api_glt_fabc_7V6T8EEVJASMTEGQKGV1
The Savage Truth: Lessons in leadership, business and life from 40 years in recruitment https://www.amazon.co.uk/dp/0648515974/ref=cm_sw_r_cp_api_glt_fabc_1BHZRTD6E8JBG5XE8QHG
Two of the best books for the recruitment industry to give a solid grounding.