Define a daemon?
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Do we need to give a password, even if the key is added in ssh?
What do masters consist of?
What is Hadoop?
In cloudera there is already a cluster, but if I want to form a cluster on ubuntu can we do it?
What is the difference between traditional RDBMS and Hadoop?
What alternate way does HDFS provides to recover data in case a Namenode
What is the process to change the files at arbitrary locations in HDFS?
How to restart Namenode?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
What do you mean by taskinstance?
Explain what is sqoop in Hadoop ?
What is a heartbeat in HDFS?