What is Reducer in Hadoop?
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What happens if the number of reducers is 0 in Hadoop?
What is a record reader?
Which port does SSH work on?
Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?
What a task tracker is in hadoop?
Can we change the file cached by distributed cache
What is the default replication factor in Hadoop and how will you change it?
What is job tracker in Hadoop?
For using hadoop list the network requirements?
Can you define udf?
Tell me some major benefits of Hadoop?
What is active and passive NameNode in Hadoop?
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