What is commodity hardware?
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What is Rack awareness?
What stored in HDFS?
Explain the Job OutputFormat?
Name some companies that use Hadoop?
How to resolve IOException: Cannot create directory
Why is hadoop faster?
How many JVMs run on a slave node?
What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
Explain the basic difference between traditional rdbms and hadoop?
What does the command mapred.job.tracker do?
Can hive run without hadoop?
Mention what is the number of default partitioner in Hadoop?