What is the relationship between Job and Task in Hadoop?
Name job control options specified by mapreduce.
how can you debug Hadoop code?
Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?
What is reduce side join in mapreduce?
Illustrate a simple example of the working of MapReduce.
Explain what is “map” and what is "reducer" in hadoop?
How many Mappers run for a MapReduce job in Hadoop?
What is partitioner and its usage?
Difference between mapreduce and spark
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
what is a sequence file in Hadoop?
What does conf.setmapper class do?
When Namenode is down what happens to job tracker?
When is it suggested to use a combiner in a MapReduce job?