Hay Aditi,

Do not overthink.

Of course they will hire you in future when you complete your concerned degree like BTech provided you are skilled according to their measuring criteria.

You should know that this 10th and 12th class result become very small and ignorable thing when you get to that position. Maybe the HR or recruiter will even not look at your 10th and 12th result because if you consider yourself capable of these MNCs then you will be having lot of other skills, projects and internships in Tech fields.

So do not worry about you these results and now focus on your tech studies because this is what matter to them. Because they are very practical in selection, if you are skilled they will select irrespective of your results in board exams.

I hope this answer helps you.

All the very best!!