Mention what are the most common input formats defined in hadoop?
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What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?
Why do we need Hadoop?
What happen if number of reducer is set to 0 in Hadoop?
Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?
Which are the three modes in which hadoop can be run?
Where are hadoop’s configuration files located and list them?
What do you mean by the NameNode High Availability in hadoop?
When should be hadoop archive create?
Ideally what should be the block size in hadoop?
Who are ‘Data Scientists’?
What is difference between reducer and combiner?
What happens when two clients try to access the same file in the hdfs?
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