Question: What is Hadoop?
It is opensource software based on java.
Question: Why we you Hadoop?
It support for application on large clusters. It scale from single server to 1000 server.
Question: What is Support?
It support data-intensive distributed application.
Question: Is it framework?
Yes, Hadoop is framework.
Question: How it work?
Applications are divided in small pieces (fragment) of work, which is execute separately in cluster.
Question: What is hadoop used for?
It is used for data-mining from large set of data. It gives you result oriented data from unstructed data.
Question: Where did Hadoop come from?
Hadoop was invented by google so that they can stored and index their imporation information. In the development of Hadoop Yahoo play very vital role.
Question: What is HDFS?
Hadoop Distributed File System (HDFS) is a sub-project of the Apache Hadoop.