Using data on GDP of a country of your choice, produce the best ARIMA model that you can for that GDP, where best is defined in terms of forecast accuracy for a minimum of ten out-of-sample values. You should discuss each step of building your model and present the related results, as appropriate.

Applied online, talked to the hiring manager over phone with mostly technical questions and not much behavioral questions. Followed up with recruiter and said they would update in one to two weeks, never got any updates from them.