What is the difference between hadoop, mongoDB, Big data? What is the difference between Hadoop, MongoDB, Big data ?
3 different things.
Hadoop is a framework. Something you use to develop an entire application.
MongoDb is a db. A nosql one. It is where you store data.
BigData is a concept. It is related to huge quantity of data. Where huge is not a fixed parameter. 4 mb was huge in 1960. Now huge means several terabyte.