25 August 2014
1st of All its Companies Act 2013 and not 2014. You have also not mentioned which exam you are talking about. CA/CS/CA.
If its CA:
ICAI has come out with the notification regarding the partial applicability of Companies Act 2013. 98 Notified section will be applicable for Nov 2014 exams. The Central Government has notified 98 sections of the Companies Act, 2013 on 12th September, 2013. Accordingly, those 98 notified sections are applicable for November 2014 examinations corresponding to their bifurcation into the Intermediate (IPC) and Final Course(s), i.e. from these 98 sections, 53 sections have been included in the Paper – 2,Business Laws, Ethics and Communication, Intermediate (IPC)Course, and 45 have been included in the Paper- 4, Corporate and Allied Laws, Final Course. For details of notification and supplementary study materials following link may kindly be seen----
http://220.227.161.86/32800bos-announ15mar14.pdf
Check out the supplementary study material issued by ICAI from link given below--
http://220.227.161.86/32794ssp-p2blec-ipcc.pdf
So Companies Act 2013 and Companies Act 1956 both will be applicable.