If 5000 people log in to the Magento admin panel (domainname.com/admin) at the same time or in the gap of 5 minutes then what will happen?
The interviewer asked me such type of question. If anyone has an answer then please comment on this.
From my point of View:
If one user logged in admin panel That is okay, but when another user logged-in in same time then first user gets discontinued and also message shown "Somebody with this Credentials logged-in with different place."
This means if another user logged-in, first person's session discontinued.
There are also settings in admin for multiple user with same credentials logged-in at same time. If this setting enables then you can logged in multiple user in Backend. But is disabled in magneto2 by Default.
Hope this will clear your Question's Answer.