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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

Explain the basic architecture of Hadoop?

492

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

653

Name some companies that use Hadoop?

Airtel,

575

Rack awareness of Namenode?

484

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

642

How is the distance between two nodes defined in Hadoop?

980

What is speculative execution in Hadoop?

665

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

920

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

560

What are the problems with Hadoop 1.0?

655

what are the nodes in the Hadoop cluster?

550

What Mapper does?

547

What is your favourite tool in the hadoop ecosystem?

539

What is the function of NodeManager?

556

explain Metadata in Namenode?

501


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Un-Answered Questions { Apache Hadoop }

What are the different types of Znodes?

590


What is compute and Storage nodes?

600


Explain what is the purpose of RecordReader in Hadoop?

339


What are the modes in which Apache Hadoop run?

341


Define a metadata?

276






What is HDFS - Hadoop Distributed File System?

548


Explain why do we need hadoop?

285


Is hadoop open source?

308


What is the function of ApplicationMaster?

558


Can you tell us more about ssh?

301


Define streaming access?

271


Can we call vms as pseudos?

298


What is zookeeper in hadoop?

282


What other technologies have you used in hadoop sta ck?

596


Can Hadoop be compared to NOSQL database like Cassandra?

542