Answer / Kal Singh Tomar

Slot in Hadoop v1 refers to a scheduling unit, which represents a resource partition within the TaskTracker for executing Map and Reduce tasks. In Hadoop v2, Slots were replaced by containers managed by the YARN ResourceManager, as it offers greater scalability and flexibility in terms of resource allocation and task scheduling.

What is TaskTracker?

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Can you explain hadoop streaming?

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What is a record reader?

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Can you explain combiner?

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Clarify what a task tracker is in hadoop?

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What does the mapred.job.tracker command do?

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What is the command to change the replication factor ?

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After increasing the replication level, I still see that data is under replicated. What could be wrong?

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What is the job tracker role in hadoop?

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List Hadoop’s three configuration files?

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How jobtracker assign tasks to the tasktracker?

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What is Mapper in Hadoop?

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