What are the basic available commands in Hadoop sqoop ?
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How is security achieved in Apache Hadoop?
How Mapper is instantiated in a running job?
Explain the shuffle?
Is it necessary to write jobs for hadoop in the java language?
Define a task tracker?
What is oozie in hadoop?
What does job conf class do?
What are combiners and its purpose?
What is cloudera and why it is used?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
Can Hadoop be compared to NOSQL database like Cassandra?
What is the jobtracker?
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