Can you define udf?
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What is the difference between namenode and datanode in hadoop?
What do you know about the speculative execution?
Which object can be used to get the progress of a particular job
Compare Apache Hadoop and Apache Spark?
Is it possible to have hadoop job output in multiple directories? If yes, how?
What are the features of Pseudo mode?
Why cloudera is used?
Explain what is webdav in hadoop?
Can you explain edge nodes in hadoop?
What is TextInputFormat in Hadoop?
How to debug Hadoop code?
What are the differences between hadoop 1 and hadoop 2?
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