Having a cousin who graduated from VTU and read online reviews here’s what I got to know. Firstly, you have to calculate the obtained marks divided by maximum marks obtained from 1 to 8 semesters * 100 to calculate your overall aggregate in engineering.
To calculate your final obtained marks in respective subjects. Final obtained marks will be different in many cases. For example,
Also, according to VTU, they use only 5th semester to 8th-semester 1st attempt marks for awarding the degree or rank's purpose. So, it can’t be considered as overall engineering aggregate marks.
If a company or an exam asks for overall engineering aggregate marks, one should use their final obtained marks from 1st semester to 8th-semester marks.