what is the age limit for aibe exam

The Answer is Yes.

First, there should be an attempt.  First, apply as a candidate to the examination, if you are not eligible you may receive rejection quoting such ineligibility. clause.  You should be concerned more about permitting the practice.  You can also file an online RTI Application and can get a copy of all such eligibility conditions stipulated for commencing practice.

You can see the rules formulated in your state bar council. Eligible persons are admitted as advocates on the rolls of the State Bar Councils. The Advocates Act, 1961 empowers State Bar Councils to frame their own rules regarding enrolment of advocates. 

A person after completing the law degree which is recognised as legally valid for the purposes of enrolment of an advocate, by the bar council, can enrol himself as an advocate and should complete the AIBE within two years from the date of enrolment.

There is no bar over the age limit.

No age limit for taking AIBE exam, which should be within 2 years of enrollment as an advocate..

Any Advocate who has graduated   after  1st  July,  2010 can appear  in All India  Bar Examination   for as many times  as it  requires   him  or her to pass such  exam  irrespective    of the fact that  he or she  has been  enrolled   for  more  than two years  as an Advocate on a State Bar Council   Roll.  The concerned   Advocate  is only barred  from  practicing  as an advocate,  if even  after  two  years  of being   enrolled    as an Advocate on a State Bar Council Roll,  he  or she is unable  to  clear/pass  the All India  Bar Examination. Thus  an Advocate  enrolled   on  a State  Roll is  not  debarred   from  appearing    in   the  All India   Bar   Examination    and  as  per  Resolution    No.  73/2010     dated   30th  April,   2010, passed  by the  General   Council  of the Bar Council   an unsuccessful  candidate   may appear in  the  All India  Bar Examination,  without  any limit on the  number  of attempts,  till he or she clears/passes such exam.