hi,

see as per ugc guide line one candidate can not pursue two regular course at the same time. you did not mention what is your ITI course duration. iti courses is 6 month to 2 years duration. where bachelor in computer science course is 3 years duration and full time course. however you may do bca course in fulltime and ITI course in distance or in part time mode. if thats not possible you have to first complete your ITI course than you may apply for bca course.

hope it would help.