How does speculative execution work in Hadoop?
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What is difference between secondary namenode, checkpoint namenode & backupnode?
Explain the usage of Context Object?
What are the configuration files in Hadoop?
Can we deploye job tracker other than name node?
What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
What is the difference between a hadoop database and relational database?
What does hadoop-metrics.properties file do?
What is a namenode?
What are the modes in which Hadoop run?
What are the features of Pseudo mode?
What is Mapper? How can we compress Mapper output in Hadoop?
What happens if number of reducers are 0?
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