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Hadoop Interview Questions
Questions Answers Views Company eMail

What are the functions of NameNode?

 1 2114

How to configure hadoop to reuse JVM for mappers?

 1 1291

mapper or reducer?

 1 1108

How to resolve IOException: Cannot create directory

 1 1132

Does Pig support multi-line commands?

 1 1003

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

 1 1086

Which one is default InputFormat in Hadoop ?

 1 2462

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

 1 1157

What is Apache Pig?

 1 940

what is a datanode?

 1 1016

How does NameNode tackle DataNode failures?

 1 1266

What is InputSplit and RecordReader?

 1 1063

What is the purpose of dfsadmin tool?

 1 1342

How can you connect an application

 1 1106

What are combiners? When should I use a combiner in my MapReduce Job?

 1 1003

Un-Answered Questions { Hadoop }

How can you set an arbitrary number of Reducers to be created for a job in Hadoop?

552

What are the different types of tables available in Hive?

767

How you can contact your client everyday ?

1042

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

1076

What is meant by Transformation? Give some examples.

385

What is the function of UNION and SPLIT operators? Give examples?

621

What is the stable version of Hive ?

2696

State some DDL Command with brief Description?

61

When to use explode in Hive?

832

When we are using queries instead of scripting?

801

How do I set up flume agent?

145

Which modes can Hadoop be run in? List a few features for each mode?

542

What is the roadmap for apache mahout version 1.0?

98

What is the latest version of spark?

343

How to skip header rows from a table in Hive?

907

For More Un-Answered { Hadoop } Questions Click Here