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Duolingo translates "Where is the classroom for the Japanese class?" as
「日本語の授業【じゅぎょう】はどこの教室【きょうしつ】ですか？」.

I don't understand the construction 「…はどこの教室…」. My instinct would have been
「日本語の授業の教室はどこですか？」. Are both used? In what circumstances?

My first idea was that this is a の-adjective, with a literal translation of
"The Japanese class has a _where-ish_ classroom" but the 「…か？」 at the end
tells me that is unlikely.
CC BY-SA 4.0
2019-05-19T17:13:51.663
68351
2019-05-20T08:31:21.470
2019-05-19T23:54:35.067
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question
particle-の
How does the 「どこの」 construction work?
Both your instinct and the Duolingo sentences are correct. The sentences can
be translated a little differently, but there's no fundamental difference in
meaning.

> 日本語の授業の教室はどこですか？  
>  Where is the Japanese lesson classroom?
>
> 日本語の授業はどこの教室ですか？  
>  Which classroom is for Japanese lessons?

I translated どこの教室 as 'which classroom' because that is natural English.
Obviously its literal meaning is "Where's classroom", but here I think the
Japanese choice of question word is more logical than the English.

I'm starting to speculate now because I'm not a native speaker, but I think
that having long lists of nouns joined by の is considered bad style. I think
two のs is fine but more than that starts to look clunky. So even though your
sentence only has two のs maybe the Duolingo one would be slightly preferrable.
CC BY-SA 4.0
2019-05-20T08:31:21.470
68360
2019-05-20T08:31:21.470
2020-06-17T08:18:27.500
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answer