What are combiners and its purpose?
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What is the heartbeat used for?
What is inputformat in hadoop?
How to enable recycle bin or trash in hadoop?
What does the command mapred.job.tracker do?
What problems have you faced when you are working on Hadoop code?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What is a checkpoint?
How many maximum jvm can run on a slave node?
Explain the benefits of block transfer?
What is small file problem in hadoop?
If a data Node is full how it's identified?
Define a task tracker?
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