Magic power vs. complex Magic

[abbet69]

No: HPFGUIDX 87095

Question:
  If Hermione cast a complicated locking spell on a door, could 
Dumbledore use a simple unlocking spell to open the door just 
because he's more powerful than Hermione or would he have to figure 
out the right counter spell.
or
If Dumbledore cast a simple locking spell of a door, could Hermione 
use a complicated spell to get the door open.

Abbet