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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?

1071

What is HDFS block size and what did you chose in your project?

1014

What is HDFS High Availability?

1011

What are different types of filesystem?

1175

how can we change Replication Factor?

1069

What is Apache Hadoop? Why is Hadoop essential for every Big Data application?

959

What are the core components of Apache Hadoop?

819

What is the difference between Apache Hadoop and RDBMS?

844

How is security achieved in Apache Hadoop?

955

What is Apache Hadoop?

893

What is a “Distributed Cache” in Apache Hadoop?

816

What is the problem with small files in Apache Hadoop?

835

What is Rack Awareness in Apache Hadoop?

851

Explain Erasure Coding in Apache Hadoop?

793

What is Disk Balancer in Apache Hadoop?

941

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Un-Answered Questions { Apache Hadoop }

What is the default block size in hdfs?

1079

What is structured data?

688

what is a datanode?

972

What is difference between regular file system and HDFS?

1089

Can you give us some more details about ssh communication between masters and the slaves?

733

How to enable recycle bin or trash in hadoop?

732

What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?

709

Why do we use Hadoop?

960

What is oozie in hadoop?

709

What is unstructured data?

702

How hdfa differs with nfs?

777

Can NameNode and DataNode be a commodity hardware?

1725

Can hive run without hadoop?

706

Input Split & Record Reader and what they do?

1074

What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

1111

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