Yes, you can import a maximum of 500 questions when using the Import questions feature. If more questions need to be asked, a new template can be extracted to add more questions.
Keep in mind that there is no maximum amount of total questions in Q&A. The maximum amount of total questions in Q&A depends on the question limit set by the Admin.
If no limit is set, there is no maximum amount of questions. Visit Question limits to learn more about this feature.