Ending Questions with だ


Is it ever proper to end questions with だ? For instance:

> 誰だ？
>
> どんな食べ物は好きだ？

I have been told it was correct and incorrect by many parties, but I've always
learned to just raise the ending intonation to denote an inquiry.




Interrogative phrases ending in だ (with the exception of dialects) are used to
**_demand information_**.

As in the following:

  * 誰だ！・何者だ！ - "Who!", "Who goes there!" 
  * どこだ！ - "Where!", "Where is it!" 
  * いつだ！ - "When!", "When is it!" 
  * 何だ！ - "What!" 
  * 何のつもりだ！ - "What are you trying to do!", "What's your intention!" 
  * おい！そこでなにしてるんだ！ - "Hey! What are you doing over there!" 
  * 誰に向かって物言ってるんだ！ - "Who do you think you're talking to!" 

