Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

How to resolve small file problem in hdfs?

924

what factors the block size takes before creation?

960

Which are the two types of 'writes' in HDFS?

1167

Explain use cases where SequenceFile class can be a good fit?

897

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

1001

What is difference between regular file system and HDFS?

993

What is rack-aware replica placement policy?

968

What is Hadoop?

1 1549

Are Namenode and job tracker on the same host?

1404

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1059

What is HDFS Federation?

927

What are watches?

978

Explain the Job OutputFormat?

912

Virtual Box & Ubuntu Installation?

929

What is the difference between HDFS and NAS ?

1316

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Un-Answered Questions { Apache Hadoop }

What is safe mode in Hadoop?

900

Where is the Mapper Output stored?

1330

How we can change Replication factor when Data is on the fly?

1298

How to keep HDFS cluster balanced?

1050

What is Safemode in Apache Hadoop?

677

What are the characteristics of hadoop framework?

616

What is Partioner in hadoop? Where does it run

925

How many JVMs run on a slave node?

980

What is a Record Reader in hadoop?

909

What is inputsplit in hadoop? Explain.

725

What is Apache Hadoop?

800

Who invented hadoop?

632

what is a datanode?

880

What is Your Cluster size ?

1392

Can NameNode and DataNode be a commodity hardware?

1636

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