In proofreading and editing, what is a "query"?

Which of the following words uses the British English spelling?

Which commonly misspelled word is spelled incorrectly?

Which of the following titles is spelled correctly?

Which of the following sentences does not contain any errors?

Which word is incorrect? If your pants are to loose you might lose your pants.

Which of the following does NOT generally fall under the responsibilities of a copyeditor?

Which of these tasks is most likely to be assigned to a copyeditor?

What is the meaning of the editing term "stet"?

True or false? There is a mispelled word in this sentence.

The company will upgrade ______ computer systems next week.