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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

Why do we use HDFS for applications having large data sets and not when there are lot of small files?

 1 2943

What are the functions of NameNode?

 1 2151

How to configure hadoop to reuse JVM for mappers?

 1 1330

How to resolve IOException: Cannot create directory

 1 1173

How to change replication factor of files already stored in HDFS?

 1 1126

Which one is default InputFormat in Hadoop ?

 1 2500

shouldn't DFS be able to handle large volumes of data already?

 1 1192

what is a datanode?

 1 1062

How does NameNode tackle DataNode failures?

 1 1305

What is InputSplit and RecordReader?

 1 1098

What is the purpose of dfsadmin tool?

 1 1380

How can you connect an application

 1 1143

how is a file of the size 1 GB uncompressed

 1 1047

Is map like a pointer?

 1 1028

What is the default replication factor?

 1 1107

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Un-Answered Questions { Apache Hadoop }

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

1110

How you can contact your client everyday ?

1074

For More Un-Answered { Apache Hadoop } Questions Click Here