What are the various input and output types supported by mapreduce?
In MapReduce, ideally how many mappers should be configured on a slave?
How to specify more than one directory as input in the Hadoop MapReduce Program?
What are the various configuration parameters required to run a mapreduce job?
What happens when a DataNode fails during the write process?
What combiners are and when you should utilize a combiner in a map reduce job?
what does the text input format do?
Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?
What is the difference between Hadoop and RDBMS?
What is the purpose of textinputformat?
When Namenode is down what happens to job tracker?
Mention what is the hadoop mapreduce apis contract for a key and value class?
What is the inputsplit in map reduce software?