Explain about the basic parameters of mapper and reducer function
In MapReduce Data Flow, when Combiner is called?
how indexing in HDFS is done?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?
what is storage and compute nodes?
What is the default value of map and reduce max attempts?
What is a "map" in Hadoop?
Explain what you understand by speculative execution
how Hadoop is different from other data processing tools?
what is "map" and what is "reducer" in Hadoop?
What are the main components of MapReduce Job?
What is the difference between RDBMS with Hadoop MapReduce?
what is distributed cache in mapreduce framework?
What is the problem with the small file in Hadoop?
