Hadoop Interview questions


Total available count: 27
Subject - Apache
Subsubject - Hadoop

What is Preferred Locations?

A preferred location (placement preferences or aka locality preferences) is a block location for an HDFS file where to compute/calculate each partition.

def getPreferredLocations(split: Partition): Seq[String] specifies placement preferences for a partition in an RDD.




Next 5 interview question(s)

1
How do you define actions?
2
What is the transformation?
3
What are the possible operations on RDD?
4
How do you define RDD?
5
How can you define SparkConf?