NO. The continental boundaries were man-made - usually by war whereas the boundaries of the continental plates are geographical features brought about by the inherent structure of our planet and the forces upon it. Sometimes the two will be the same - particularly if a mountain raner intervenes. Volcanoes generally appear along faults( weak links) in the earths' surface.
definiately not because some mountains along side the coninents are fol mountains meaning that they are formed by two of the continents pushing towards each other. this happens every year and the continents move towards each other by 3cm. assume that the himalaya mountain it getting 3cm taller every year
this is not the case alongside every continent
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Most of the Andes and Rocky mountains are formed by their continents being buckled while pushing against the Pacific plate.
Volcanos normally form along the edges of plates that are being subducted. For example the Pacific Plate is being subducted below east Asia. Both buckling and volcanic forms can and frequently do occur together.
Mountains along the edge of a continent can also be relics from previous collisions with other continents before they were torn apart again. However they are usually quite worn down.