Final exam, Question 7: airlines operating in both directions or any direction

I´ve just resolved question 7, and now, seeing the detailed answer, I think the solution provided is for an easier problem than asked in the problem.

Problem asks for ’ which alliance has the most unique carriers(airlines) operating between the airports JFK and LHR , in both directions.’, so only airlines operating both JFK to LHR and LHR to JFK should be counted.

But I´m afraid that the solution provided is quering for : which alliance has the most unique carriers(airlines) operating between the airports JFK and LHR , in ANY direction. The solution provided could count an airline than only operates JFK to LHR but not LHR to JFK

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Hi @julioaotero suggest you try and run the first two stages and you’ll see from the results that it runs in both directions.

Not quite. A specific airline doesn’t have to operate both routes. Here’s what it says:


Unless it’s changed in your version?

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Hi @julioaotero,

Thanks for this feedback!!!

We will definitely make the necessary changes in the question statement so that the users do not get confused.

Thanks Again!!

Sonali.

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