What is active and passive NameNode in Hadoop?
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What are the tools used in big data?
Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?
What is JobTracker?
What is the NameNode port number?
Is it possible to rename the output file, and if so, how?
Mention what is data cleansing?
What are the port numbers of job tracker?
What are the features of Standalone (local) mode?
Where are Hadoop’s configuration files located?
What is High Availability feature in Hadoop2?
Mention what are the three modes in which hadoop can be run?
Give me examples of unstructured data?
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