Quiz: Updating Documents in the shell

For this quiz, input collection has below field in document.
“pet”: “wolf”,

All the answers in query have filter as ,
“pet”: “cat”,

so all the options have a filter which do not match with the given input collection. Can the filter in options be corrected ?

There is nothing wrong with the quiz. What is your point? What did you try? What did you get wrong?

The question is about an hypothetical collection. The question might be missing a sentence mentioning that some documents have pet:cat. I guess they assume that

following structure and fields
was sufficient to means that documents do not necessarily have the same value for all the fields.

Hi Steve

Thanks for the reply, after reading your comment and going through question again. My doubt has cleared.