What is Mapper? How can we compress Mapper output in Hadoop?
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How to restart NameNode or all the daemons in Hadoop?
What do you know about yarn?
What does jps command do in Hadoop?
Why cloudera is used?
Mention what is data cleansing?
Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?
What are the functionalities of jobtracer?
What are the tools used in big data?
Explain about Hadoop file system and processing framework?
What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?
What is Erasure Coding in Hadoop?
What do you understand by a closure in scala?
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