What are the functionalities of jobtracker?
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What do you know about sequencefileinputformat?
Which are the three main hdfs-site.xml properties?
Should we use RAID in Hadoop or not?
What are watches?
What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
Which are the two types of 'writes' in HDFS?
How does NameNode tackle DataNode failures?
Explain what is the purpose of RecordReader in Hadoop?
What is the use of Combiner?
What is the difference between Apache Hadoop and RDBMS?
when hadoop enter in safe mode?
Virtual Box & Ubuntu Installation?
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