Hadoop General Interview Questions
Questions Answers Views Company eMail

What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?

41

What are the configuration files in Hadoop?

3

Compare Apache Hadoop and Apache Spark?

3




What are the different modes in which we can configure/install Hadoop?

1

Explain how Hadoop cluster hardware planning and provisioning is done?

7

How to create a user in Hadoop?

2

What are the major differences between Hadoop 2 and Hadoop 3?

1

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

5




How to specify more than one path for storage in Hadoop?

1

What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?

19

What is JPS? Why is it used in Hadoop?

17

What is the key difference between NameNode and DataNode in Hadoop?

3

What is Small File Problem in Hadoop? How can it be resolved?

13

Ideally what should be replication factor in a Hadoop cluster?

1

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

5


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Un-Answered Questions { Hadoop General }

List Hadoop’s three configuration files?

1


List some use cases where classification machine learning algorithms can be used.

1


What are the hadoop configuration files at present?

3


Which database is used in hadoop?

1


Mention what is the difference between an rdbms and hadoop?

3






What are some typical functions of job tracker in hadoop?

3


Can hadoop handle streaming data?

3


Clarify what is sequence file input format?

3


Do we need to place 2nd and 3rd data in rack 2 only?

21


What kind of hardware is best for hadoop?

3


How to create a user in Hadoop?

2


What is the difference between namenode and datanode in hadoop?

3


What is Mapper in Hadoop?

7


Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

3


What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

5