TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.
PROBLEM: Category: SEX CHANGES 
Clue: Don't let the pearls fool you, these lady bivalves can change into males when it suits them

SOLUTION: oysters

PROBLEM: Category: ON A SWISS ARMY KNIFE 
Clue: There are 2 of these, one for wood & one for metal

SOLUTION: a saw

PROBLEM: Category: MAKING CONNECTIONS 
Clue: In "Sixteen Candles" the geek predicts, "Me and her will" do this, the connection of a computer & an outside entity

SOLUTION:
interface