Hello, we are glad that you are interested in our component, as far as your first question is concerned:
At first you create a quiz. Users pass it. When the expiration date runs out you can switch option 'Show full statistics' on. (You can see it on our demo site
demo2.ari-soft.com/administrator/index.php). After switching this option on users will be able to see full statistics of every quiz passed.
As far as your second question is concerned:
You can use module 'ARI Quiz top results', which is included into the component.
Regards,
ARI Soft