Mention what are the main configuration parameters that user need to specify to run mapreduce job?
What is identity mapper and chain mapper?
What are the four basic parameters of a reducer?
Write a Mapreduce Program for Character Count ?
Is reduce-only job possible in Hadoop MapReduce?
What is the default value of map and reduce max attempts?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
What combiners are and when you should use a combiner in a mapreduce job?
How to get the single file as the output from MapReduce Job?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
What is the Hadoop MapReduce API contract for a key and value Class?
What is an identity mapper and identity reducer?
What are the main components of MapReduce Job?