ambiguity

The Palantir decomposition round has no right answer, it has a right METHOD, and it's the most-failed interview in the FDE loop. Here is the four-move rubric interviewers actually score: clarify, model, spine, iterate.

The most open-ended prompt in the Palantir canon, no scale given, no user given, no disaster given. What separates passing answers is one design assumption about the data that almost nobody states out loud.

The most-reported decomposition prompt in the FDE canon. Almost every candidate builds a routing model, and almost every candidate is optimizing the wrong term of the equation.

The number 500 is the trap. Candidates hear it as a scaling problem and design a pipeline factory, when the interviewer is watching to see whether you refuse to ingest 500 things at all.

A dataset lands in your lap with a one-week deadline attached. Most candidates start exploring the data. The ones who pass start by working out which questions this data physically cannot answer.

The only round where you choose the problem, which sounds like a gift and is where most candidates lose it. Four things get graded in one flow, and the fourth is the one engineers skip.

The single most common FDE behavioral question, and the 'week one' follow-up is where most candidates collapse. Here's the structure that signals you can be dropped into chaos and produce order.