Hello

If you don't appear for the practical exam (computer science), then they(authority/management) may fail you by keeping zero marks or marking you as absent during the exam- because of which you will have to reappear whenever asked to do. It can even result in spoiling your one year of class 12th.
So, in order to avoid such situation, you should appear for the exam and give your Bestt possible by studying little bit about it- so that atleast you can pass the exam. Hope you're getting my point.!

Good luck.!

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Arth, practical exam is a very important thing. Most schools receive a external examiner for it. While your teacher may hold some seay, if you are absent, your 30 marks are most probably gone unless you have some genuine excuse and even then most probably its gone. That will leave a big dent in your subject marks. And 12th marks are very important in all academic pursuits. So my sincere advise would be for you to give your best at all exams in 12th. Good luck.

Hello Arth, I think you are old enough to take your examinations seriously and you are in class 12 after this you will be doing a professional course, so I think you know the importance of class 12 boards marks. Students try to do their best in practicals so that if in case theory exam is not so good then at least they will not have bad marks/bad grades in their pass certificate.
So take your exams seriously and give your practicals properly.
Good luck!!
Hope it helps