Do quiz form give responses immediately after submissions?

If you're referring to the auto-responder email or notification email, yes, it will send immediately after submission. 

You can add an autoresponder email to your form by following this guide: https://www.jotform.com/help/26-Setting-up-an-Autoresponder-Email

You can add a notification email to your form by following this guide: https://www.jotform.com/help/25-Setting-up-Email-Notifications

I hope this information helps. If you're referring to a different issue, please provide more details or information so we can help you.