hi,

see in official website there is no specific syllabus, however since bachelor in computer application has courses includes in syllabus related with modern physics, mathematics, so according to other colleges entrance test, questions will be form 10+2 mathematics, physics, english and basic chemistry. however you may follow r guptas "BCA Bachelore of Computer Applications Exam - Guide 2020 Edition  (English, Paperback, Gupta R)"