When is it suggested to use a combiner in a MapReduce job?
How does MapReduce framework view its input internally?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
Is it possible to search for files using wildcards?
What is the Hadoop MapReduce API contract for a key and value Class?
Why is Apache Spark faster than Hadoop MapReduce?
When should you use a reducer?
What is the problem with the small file in Hadoop?
What is Data Locality in Hadoop?
When should you use sequencefileinputformat?
What is an identity mapper and identity reducer?
List the network requirements for using Hadoop ?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?