What is a Combiner?
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What are the modes in which Apache Hadoop run?
What is a Record Reader in hadoop?
Explain how can we change the split size if our commodity hardware has less storage space?
What is crontab? Explain with suitable example?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
What is version-id mismatch error in hadoop?
Explain the hadoop-core configuration?
What are the problems with Hadoop 1.0?
Do we need to give a password, even if the key is added in ssh?
explain Metadata in Namenode?
Where is the Mapper Output intermediate kay-value data stored ?
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