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?

891

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

1000

Name some companies that use Hadoop?

Airtel,

913

Rack awareness of Namenode?

809

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

1017

How is the distance between two nodes defined in Hadoop?

1422

What is speculative execution in Hadoop?

1020

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

1299

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

907

What are the problems with Hadoop 1.0?

991

what are the nodes in the Hadoop cluster?

998

What Mapper does?

938

What is your favourite tool in the hadoop ecosystem?

919

What is the function of NodeManager?

867

explain Metadata in Namenode?

860

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Un-Answered Questions { Apache Hadoop }

What is HDFS Federation?

927

Explain the hadoop-core configuration?

628

What does ‘jps’ command do?

647

Give the use of the bootstrap panel.

633

What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?

717

Who is a 'user' in HDFS?

846

What is a block and block scanner in HDFS?

980

What is the problem with small files in Apache Hadoop?

726

What are the Basics of Hadoop?

885

What is high availability in hadoop?

622

What Mapper does?

938

What is version-id mismatch error in hadoop?

1015

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

1123

Is it necessary to know java to learn hadoop?

612

Name the various types of lists supported by bootstrap.

617

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