What did mean by data-node?
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Which operating system(s) are supported for production hadoop deployment?
How to do ‘map’ and ‘reduce’ works?
What does hadoop-env.sh do?
What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?
Name the most common Input Formats defined in Hadoop? Which one is default?
What is fsck?
What does name-node mean in hadoop?
Where are Hadoop’s configuration files located?
What is Disk Balancer in Hadoop?
What type of data hadoop can handle ?
Explain how can you debug hadoop code?
Explain what happens in text format?
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