In  order to apply to ISA for admission to I year B.Arch,  you will require to clear any one of the following  three main exams one can take for taking admission in B.Arch.

NATA  or JEE or Karnataka State Entrance exam for Architecture.

 The syllabus is more or less same,  having Mathematics, Aptitude Test & Drawing Test as major sections.

In order to know more, please follow this link – Admission to ISA