What are the important differences between apache and hadoop?
What are the steps to submit a Hadoop job?
How many JVMs run on a slave node?
What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?
What is the main purpose of HDFS fsck command?
How to use Apache Zookeeper command line interface?
How to come out of the insert mode?
How client application interacts with the NameNode?
Does Hadoop requires RAID?
What hadoop does in safe mode?
How can one increase replication factor to a desired value in Hadoop?
What is Row Key?
How does master slave architecture in the hadoop?