How to overwrite an existing output file during execution of mapreduce jobs?
What combiners are and when you should use a combiner in a mapreduce job?
What is a TaskInstance?
What is a scarce system resource?
What happens when the node running the map task fails before the map output has been sent to the reducer?
Explain slot in Hadoop Map-Reduce v1?
Define the purpose of the partition function in mapreduce framework
What can be optimum value for Reducer?
Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?
What is difference between an input split and hdfs block?
What is reduce side join in mapreduce?
What is the difference between Job and Task in MapReduce?
What is the relation between MapReduce and Hive?
What do you mean by inputformat?
When is the reducers are started in a MapReduce job?
What do you understand by mapreduce?