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?

1068

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

1014

What is HDFS High Availability?

1008

What are different types of filesystem?

1173

how can we change Replication Factor?

1068

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

956

What are the core components of Apache Hadoop?

816

What is the difference between Apache Hadoop and RDBMS?

841

How is security achieved in Apache Hadoop?

952

What is Apache Hadoop?

892

What is a “Distributed Cache” in Apache Hadoop?

811

What is the problem with small files in Apache Hadoop?

833

What is Rack Awareness in Apache Hadoop?

850

Explain Erasure Coding in Apache Hadoop?

792

What is Disk Balancer in Apache Hadoop?

940

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Un-Answered Questions { Apache Hadoop }

What will you do when NameNode is down?

1054

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

732

Explain why do we need hadoop?

705

What is the use of Combiner?

1010

Explain the benefits of block transfer?

857

What is a spill factor with respect to the ram?

908

how would you modify that solution to only count the number of unique words in all the documents?

1007

Is hadoop a database?

735

Does the hdfs client decide the input split or namenode?

711

Explain how input and output data format of the hadoop framework?

744

What happens in a textinputformat?

698

How many Daemon processes run on a Hadoop system?

1128

What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?

1209

Mention what is the use of Context Object?

748

What is the port number for NameNode

881

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