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

885

What are the benefits of block transfer?

1033

How did you debug your Hadoop code ?

1410

What will you do when NameNode is down?

1054

What is the best hardware configuration to run Hadoop?

1665

Should we use RAID in Hadoop or not?

1109

How to change Replication Factor For below cases ?

1149

What are the basic available commands in Hadoop sqoop ?

1010

On What concept the Hadoop framework works?

1233

How to write a Custom Key Class?

969

What if rack 2 and datanode fails?

1102

How client application interacts with the NameNode?

991

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

982

How the HDFS Blocks are replicated?

1000

Explain InputFormat?

1065

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Un-Answered Questions { Apache Hadoop }

What is nlineoutputformat?

716

Is hadoop required for data science?

723

What is the problem with HDFS and streaming data like logs

1062

What is compute and Storage nodes?

1055

how to share the metastore within multiple users?

963

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

1036

What is DistributedCache and its purpose?

941

How to enable recycle bin or trash in hadoop?

733

Explain a simple Map/Reduce problem.

780

How can I install Cloudera VM in my system?

1011

How can I restart namenode?

757

Is hadoop the future?

692

What is a Combiner?

796

What is a Task instance in Hadoop? Where does it run?1

884

In which location Name Node stores its Metadata and why?

1424

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