Can Hadoop be compared to NOSQL database like Cassandra?
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What is Rack awareness?
What happens to a namenode, when job tracker is down?
What is the process to change the files at arbitrary locations in HDFS?
Define a daemon?
How many JVMs run on a slave node?
How did you debug your Hadoop code ?
What is Derby database?
What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
What are the main components of a Hadoop Application?
How we can change Replication factor when Data is on the fly?
What do you know about keyvaluetextinputformat?
What do sorting do?
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