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?

993

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

1100

Name some companies that use Hadoop?

Airtel,

999

Rack awareness of Namenode?

909

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

1095

How is the distance between two nodes defined in Hadoop?

1496

What is speculative execution in Hadoop?

1091

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

1383

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

993

What are the problems with Hadoop 1.0?

1092

what are the nodes in the Hadoop cluster?

1074

What Mapper does?

1030

What is your favourite tool in the hadoop ecosystem?

1006

What is the function of NodeManager?

944

explain Metadata in Namenode?

979

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Un-Answered Questions { Apache Hadoop }

Explain the features of pseudo mode?

751

Are Namenode and job tracker on the same host?

1488

What are the modules that constitute the Apache Hadoop 2.0 framework?

1043

In which location Name Node stores its Metadata and why?

1423

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

1008

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

959

What Mapper does?

1030

Does the hdfs client decide the input split or namenode?

712

What does ‘jps’ command do?

722

What exactly is hadoop?

725

Give the use of the bootstrap panel.

706

What are the default configuration files that are used in hadoop?

730

Name the various types of lists supported by bootstrap.

721

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1347

What is a block and block scanner in HDFS?

1061

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