Hello aspirant,

YES, you can do BCA after studying Bio Science. In fact, Any student of any stream from class 12th can study BCA providing the students has passed the class 12th with minimum passing grades.

Further, the eligibility criteria for BCA Course is as follows :

Candidates who have completed their 10+2 from any recognized board in any stream are eligible for admission to BCA programme.

Further, YES, you will get a permanent Job after completing BCA degree.

Further, to know more about the BSA Course, career, scope, etc - you can follow the below mentioned link to know more : https://www.careers360.com/courses/bca-bachelor-of-computer-applications#:~:text=Candidates%20who%20have%20completed%20their,for%20admission%20to%20BCA%20programme.

I hope that this will help.