What is formatting of the dfs?
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Do we need to give a password, even if the key is added in ssh?
Can we have multiple entries in the master files?
How to resolve small file problem in hdfs?
How does an hadoop application look like or their basic components?
What does ‘jps’ command do?
How can we check whether namenode is working or not?
What is Apache Hadoop?
Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
Define a datanode?
What are active and passive "NameNodes"?
What is the difference between Apache Hadoop and RDBMS?
How many Daemon processes run on a Hadoop system?
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