Will my pre-finished floor have a beveled edge?

Yes. Bevels are added to the sides of the board to soften the edge and help boards line up next to each other with even thickness for easier installation and structural stability. Bevels help to prevent the edges of the flooring finish being crushed when the flooring expands. This is why there are very few square edged prefinished floors. Some prefinished floors have bevels on all four sides of the board, and some only on the two long sides.