Give a brief overview of Hadoop history?
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List out some common problems faced by data analyst?
What are the hadoop configuration files at present?
What is High Availability feature in Hadoop2?
Explain what is jobtracker in hadoop? What are the actions followed by hadoop?
Name the most common Input Formats defined in Hadoop? Which one is default?
What is difference between secondary namenode, checkpoint namenode & backupnode?
Explain some important features of hadoop?
How to debug Hadoop code?
What are the side data distribution techniques?
Mention what is data cleansing?
What is the use of recordreader in hadoop?
Explain how can you check whether namenode is working beside using the jps command?
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