Is there any scope for developing a quiz application based on Wikipedia articles?

Indeed, it's a very good idea in my opinion and, even if at a first sight seems a little bit difficult to build it, you really can do it. Here how I'd go through the development process: 1) First problem is getting data from Wikipedia. That's not easy as Wikipedia does not provide an API but I'd use DBpedia http://dbpedia.org/About for the purpose. As you can see on their website, they basically provide a REST API to extract structured information from Wikipedia. For example you can query DBpedia to extract "German musicians who were born in Berlin" http://dbpedia.org/snorql/?query=PREFIX+dbo%3A+%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2F%3E%0D%0A%0D%0ASELECT+%3Fname+%3Fbirth+%3Fdescription+%3Fperson+WHERE+%7B%0D%0A+++++%3Fperson+dbo%3AbirthPlace+%3ABerlin+.%0D%0A+++++%3Fperson+%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2Fsubject%3E+%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FCategory%3AGerman_musicians%3E+.%0D%0A+++++%3Fperson+dbo%3AbirthDate+%3Fbirth+.%0D%0A+++++%3Fperson+foaf%3Aname+%3Fname+.%0D%0A+++++%3Fperson+rdfs%3Acomment+%3Fdescription+.%0D%0A+++++FILTER+(LANG(%3Fdescription)+%3D+%27en%27)+.%0D%0A%7D%0D%0AORDER+BY+%3Fname. Then you can parse the results and manage them inside your application. 2) Once you have the data you need to create the quiz and show it to the user. The complexity of this step really depends on how you structure your application in terms of features and design. For the 2nd step you could need several months but in order to speed up the development process you could use some backend-as-a-service like https://parse.com/, Kinvey http://www.kinvey.com/ or http://teech.io/documentation/. Disclaimer: I'm founder of Teech.io

I'd say I like your way of thinking. I'm not sure how many people would like to take quizzes if no awards are provide but they can get scores which would encourage some. I'd say it takes 5 months for a working prototype. But if you are not software engineer I don't suggest you going into this.