How Mapper is instantiated in a running job?
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Explain why the name ‘hadoop’?
Is fs.mapr.working.dir a single directory?
What is rack-aware replica placement policy?
Define streaming access?
What is the difference between HDFS and NAS ?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What are the benefits of block transfer?
Who is a 'user' in HDFS?
Is hadoop a database?
Input Split & Record Reader and what they do?
How is HDFS fault tolerant?
How we can change Replication factor when Data is on the fly?
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