What would happen if two titles of different article is same?

[nikhil]

It will create a spamming. As title indicates the what the article is about and distinguishes form other articles.When the second person attempts to save the page, media wiki will attempts to save the page, Media wiki will attempt to merge their changes into the current version of the text? If merge will fail the user will receive an “edit conflict” message. It will generate a different message.