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 the port number for NameNode

839

What are the benefits of block transfer?

990

How did you debug your Hadoop code ?

1368

What will you do when NameNode is down?

997

What is the best hardware configuration to run Hadoop?

1624

Should we use RAID in Hadoop or not?

1058

How to change Replication Factor For below cases ?

1085

What are the basic available commands in Hadoop sqoop ?

964

On What concept the Hadoop framework works?

1200

How to write a Custom Key Class?

937

What if rack 2 and datanode fails?

1060

How client application interacts with the NameNode?

955

How is the option in Hadoop to skip the bad records?

949

How the HDFS Blocks are replicated?

962

Explain InputFormat?

1010

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Un-Answered Questions { Apache Hadoop }

How to enable trash/recycle bin in hadoop?

737

What is the InputFormat ?

1017

Is fs.mapr.working.dir a single directory?

683

Explain the features of fully distributed mode?

625

What is Hadoop Custom partitioner ?

1001

Input Split & Record Reader and what they do?

1030

Can you tell us more about ssh?

716

What is the problem with HDFS and streaming data like logs

1022

Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

640

What is the full form of fsck?

702

Define streaming access?

669

Is secondary namenode a substitute to the namenode?

684

Define a commodity hardware? Does commodity hardware include ram?

744

Does Hadoop requires RAID?

943

How can you connect an application

1028

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