What do shuffling do?
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How to enable recycle bin or trash in hadoop?
Explain what is the purpose of RecordReader in Hadoop?
What is the meaning of speculative execution in Hadoop? Why is it important?
Who invented hadoop?
How the HDFS Blocks are replicated?
What is the difference between a Hadoop and Relational Database and Nosql?
What is the main purpose of HDFS fsck command?
Define a commodity hardware? Does commodity hardware include ram?
What is 'Key value pair' in HDFS?
Explain the difference between NameNode
What is Hadoop serialization?
What is Disk Balancer in Apache Hadoop?
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