JECA MCA exam is a demanding exam, you should start your preparation as earlier as you can do. Following are some tips which will help you in cracking the examination:

You should have basic knowledge of your department.
Try to practice model paper for
Always try to answer that type of question for which you have confirmed answer.
Be attentive in class
Create a timetable
Work on your weak areas
refer only important books
Manage time properly
Do not skip any topic