Total no. of leaves granted in my case was 156 days...The only criteria to appear for exam is that you should be serving the last 6 months of articleship as on 1st day of month of exam... If your total no. of leave days exceeds;then you will have to serve extension even after completion date of articleship on papers for that equivalent no. of days...So, that doen't have any posponment to your exam attempt but your articleship period may get postponed...
Regards,
Radhika