Explain how do ‘map’ and ‘reduce’ works?
Can the balancer be run while Hadoop is in use?
How does an hadoop application look like or their basic components?
What are the modules that constitute the Apache Hadoop 2.0 framework?
What is the meaning of the term "non-DFS used" in Hadoop web-console?
What is the best hardware configuration to run Hadoop?
Define streaming access?
What is the port number for NameNode
What are the steps to submit a Hadoop job?
How to resolve IOException: Cannot create directory
What is the use of combiners in the hadoop framework?
What is Your Cluster size ?
Define fault tolerance?