Storage location of vectors

how to do such questions like q4. is there any place to read theortical knowledge asked in q4

Hey @vector.9974
Can u please share the screenshot of the question :slight_smile:

For such kind of theoretical knowledge you can refer to C++ official documentation
It must contain all the theory

where to study c++ official documentation…any source

Here refer to this website http://www.cplusplus.com/reference/