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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

Explain the basic architecture of Hadoop?

 616

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

 755

Name some companies that use Hadoop?

Airtel,

673

Rack awareness of Namenode?

 583

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

 731

How is the distance between two nodes defined in Hadoop?

 1128

What is speculative execution in Hadoop?

 767

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

 1026

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

 659

What are the problems with Hadoop 1.0?

 764

what are the nodes in the Hadoop cluster?

 658

What Mapper does?

 657

What is your favourite tool in the hadoop ecosystem?

 639

What is the function of NodeManager?

 655

explain Metadata in Namenode?

 595

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Un-Answered Questions { Apache Hadoop }

What is HDFS - Hadoop Distributed File System?

644

Explain why do we need hadoop?

381

How many instances of tasktracker run on a hadoop cluster?

404

What is the problem with small files in Apache Hadoop?

443

How to restart Namenode?

448




what are the nodes in the Hadoop cluster?

658

what is SPF?

1210

What is Input Split in hadoop?

618

What is Distributed Cache?

600

Explain the wordcount implementation via hadoop framework ?

388

Explain why the name ‘hadoop’?

380

What are the problems with Hadoop 1.0?

764

Explain InputFormat?

663

What are different hdfs dfs shell commands to perform copy operation?

788

Explain the core components of hadoop?

377

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