whenever a new act included in ICAI syllabus, the first 1-2 attempts are pretty easy. the questions asked are on the basic provisions instead of applications etc.
so just use the ICAI supplementary study material for the Companies Act 2013 and cover the basic provisions. one more thing you should ensure that you cover differences between the current act and the old act..for eg difference between section 185/186 of the new act and 295 of the old act.
stick to basics and don't refer to too many reference material.