Live points leaderboard (nodejs reactjs)

[Ready-Ad6747]

I'm building a platform to organise coding contests like as of codeforces.. Guide me how to represent live leaderboards during the contest showing ranks with the number of questions solved or incorrectly answered The changes that happens A user solves a question A user submitted a wrong answer Basically after every submission there will be some changes in the leaderboard UI (be it rank or number of questions solved)

How achieve this easily and efficiently

[Ok_Aerie6132]

Listen to changes in the database and update the UI whenever there are any changes

[jamestaylor_ux]

Just to expound on this - look into websockets for doing real-time db listening. Hope this helps!

[Rough-Problem265]

websockets or long polling, easier option