What is the meaning of the term "non-DFS used" in Hadoop web-console?
What is HDFS Federation?
How is security achieved in Apache Hadoop?
How many Daemon processes run on a Hadoop system?
What happens to a namenode, when job tracker is down?
What is the difference between Apache Hadoop and RDBMS?
Where do you specify the Mapper Implementation?
What is the jobtracker and what it performs in a hadoop cluster?
What is a Record Reader in hadoop?
If a data Node is full how it's identified?
Explain what is sqoop in Hadoop ?
Explain the master class and the output class do?
What do masters consist of?
What are the steps to submit a Hadoop job?
How many instances of tasktracker run on a hadoop cluster?