This is not a trick question. It is usually sincere and not intended to upset or confuse. Remember, the partner asking the question probably asks the same question of himself frequently and is just as uncertain about the answer (if one exists).

Few of us have concrete plans that are 95% certain 5 years down the road. Say something like, “I hope to be a partner in a firm like yours or to be in-house with a firm client. What does it take to make partner here?” These days, many associates do not make partner. If you don’t want to make partner, going in-house with a firm client is the next best thing for the firm. Still, asking what it takes to make partner at the firm shows motivation.