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Hadoop Interview questions


Total available count: 27
Subject - Apache
Subsubject - Hadoop
1
What is Hector?
2
What do you understand by Snitches?
3
Who uses Cassandra?
4
What is a BlockManager?
5
What is Speculative Execution of a tasks?
6
What is Task, with regards to Spark Job execution?
7
What is DAGSchedular and how it performs?
8
Please define executors in detail?
9
Please explain, how workers work, when a new Job submitted to them?
10
What are the workers?
11
What is the purpose of Driver in Spark Architecture?
12
Define Spark architecture?
13
What is checkpointing?
14
What is Shuffling?
15
Data is spread in all the nodes of cluster, how spark tries to process this data?
16
What is wide Transformations?
17
What is Narrow Transformations?
18
How many type of transformations exist?
19
What is Preferred Locations?
20
How do you define actions?
21
What is the transformation?
22
What are the possible operations on RDD?
23
How do you define RDD?
24
How can you define SparkConf?
25
How do you define SparkContext?
26
Why both Spark and Hadoop needed?
27
Why Spark, even Hadoop exists?