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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

Explain the basic architecture of Hadoop?

933

On what basis name node distribute blocks across the data nodes?

1060

Name some companies that use Hadoop?

Airtel,

955

Rack awareness of Namenode?

854

Have you ever used Counters in Hadoop. Give us an example scenario?

1063

How is the distance between two nodes defined in Hadoop?

1455

What is speculative execution in Hadoop?

1051

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

1343

What alternate way does HDFS provides to recover data in case a Namenode

955

What are the problems with Hadoop 1.0?

1048

what are the nodes in the Hadoop cluster?

1045

What Mapper does?

985

What is your favourite tool in the hadoop ecosystem?

958

What is the function of NodeManager?

907

explain Metadata in Namenode?

917

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Un-Answered Questions { Apache Hadoop }

Why are the number of splits equal to the number of maps?

961

Explain the use of tasktracker in the hadoop cluster?

633

Explain why the name ‘hadoop’?

708

What is the InputFormat ?

1018

What are the two main components of ResourceManager?

1164

What is crontab? Explain with suitable example?

1057

Is hadoop the future?

652

What do you understand from Node redundancy and is it exist in hadoop cluster?

1232

What is Partioner in hadoop? Where does it run

975

Explain a simple Map/Reduce problem.

719

Explain the features of stand alone (local) mode?

613

what are Task Tracker and Job Tracker?

1071

Rack awareness of Namenode?

854

What are the problems with Hadoop 1.0?

1048

What is the difference between HDFS and NAS ?

1372

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