Another argument in favour of having a centralised exam is that it will allow candidates to compete for more number of jobs, spread across the country. “Currently, an RRB in a particular area recruits for only a limited number of vacancies. If all the vacancies in various categories of jobs were compiled and put up for a centralised exam, applicants will have a better chance of qualifying since the number of jobs will be much more than those in a particular RRB,” an official explained.