What will you do when NameNode is down?
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What Mapper does?
How a task is scheduled by a jobtracker?
Explain the use of tasktracker in the hadoop cluster?
What is unstructured data?
How to enable recycle bin or trash in hadoop?
What are the modules that constitute the Apache Hadoop 2.0 framework?
What is high availability in hadoop?
What is Apache Hadoop? Why is Hadoop essential for every Big Data application?
Define a task tracker?
Why do we use HDFS for applications having large data sets and not when there are lot of small files?
Name some companies that use Hadoop?
Which are the two types of 'writes' in HDFS?