Question

What kind of sentence is.....

where did all the people go

is a
complex sentence,imperrative sentence, interrogative sentence,compound sentence

Answer 1

Interrogative. they r asking a question, which is a form of interigating someone.

Answer 2

The answer is interrogative, as interrogative stems from the word interrogate, which is to ask. Judging by the tone of the sentence, I can infer that the missing punctuation at the end is a question mark, which hence leads to an interrogative sentence being the correct answer.