どうするのか vs どうするか
as in
これからロシアがどうするのか、世界の人たちが見ています。
https://nhkeasier.com/story/8206/

Is どうするか grammatical? I've supposed this is one of the casual ways (plain form) of talking. If not, why not? If it is, what is the difference in usage between どうするか and どうするのか?

Thanks for your comments!

Show answer from the AI monga

Yes, both "どうするのか" and "どうするか" are grammatically correct in Japanese, but they have slightly different nuances in usage.

"どうするのか" is a more formal and explicit way of asking "what will you do?" or "what will happen?" It is often used in written or formal speech to express a sense of curiosity or concern about someone's actions or decisions. In the example sentence you provided, "これからロシアがどうするのか、世界の人たちが見ています。" means "The world is watching to see what Russia will do in the future."

On the other hand, "どうするか" is a more casual and direct way of asking "what will you do?" It is commonly used in informal conversations or when speaking to friends or peers. While both expressions convey a similar meaning, "どうするか" may sound more straightforward and less polite compared to "どうするのか."

In summary, the choice between "どうするのか" and "どうするか" depends on the level of formality and politeness you want to convey in your speech or writing.