#1251

dmaitra1
Participant

1.What is Record reader in Map-reduce?

Record reader translates the raw i/p into key value pair.

2.What are “slaves” and “masters” in Hadoop?
Ans: Data Node and Task Tracker daemon

2.How many datanodes can run on a single Hadoop cluster?
Ans: We can create multiple datanodes but single name noder per cluster

3.What is job tracker in Hadoop?
Ans:The Job Tracker Is A Master Node In Hadoop And It Assigns Job To The Respective Task Tracker.

4.What is “jps”?
Ans:Jps Means Java Processor.

5.What is the purpose of RecordReader in Hadoop?
Ans: Record reader translates the raw i/p into key value pair.

Prwatech