What are the core components of Apache Hadoop?
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What is a namenode? How many instances of namenode run on a hadoop cluster?
Explain the overview of hadoop history breifly?
What is a task instance in hadoop? Where does it run?
Why are the number of splits equal to the number of maps?
What is Writable & WritableComparable interface?
Explain what is sqoop in Hadoop ?
Which files are used by the startup and shutdown commands?
What are the functions of NameNode?
How to enable recycle bin or trash in hadoop?
What do shuffling do?
What is the meaning of the term "non-DFS used" in Hadoop web-console?
when hadoop enter in safe mode?
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