Explain Data Locality in Hadoop?
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Why does one remove or add nodes in a Hadoop cluster frequently?
How to use combiner in hadoop ?
Do we require two servers for the namenode and the datanodes?
Explain what is hadoop?
What are the four basic parameters of a mapper?
Are job tracker and task trackers present in separate machines?
What does the file hadoop-metrics.properties do?
Define a sequence file in hadoop?
Mention what is data cleansing?
Which directory does hadoop install to?
Explain Erasure Coding in Hadoop?
How to do ‘map’ and ‘reduce’ works?
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