Which one is default?
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What is the relationship between Jobs and Tasks in Hadoop?
Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?
What is a udf?
How Hadoop is cost-effective?
If the hadoop administrator needs to make a change, which configuration file does he need to change?
Mention what are the three modes in which hadoop can be run?
What is the role of the namenode?
Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?
What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
How can one write custom record reader?
Explain what is a sequence file in hadoop?
What jobtracker is in hadoop? What are the activities followed by hadoop?
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