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?

892

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

1007

Name some companies that use Hadoop?

Airtel,

917

Rack awareness of Namenode?

814

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

1023

How is the distance between two nodes defined in Hadoop?

1424

What is speculative execution in Hadoop?

1021

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

1302

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

911

What are the problems with Hadoop 1.0?

994

what are the nodes in the Hadoop cluster?

1003

What Mapper does?

945

What is your favourite tool in the hadoop ecosystem?

926

What is the function of NodeManager?

868

explain Metadata in Namenode?

874

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Un-Answered Questions { Apache Hadoop }

How to enable recycle bin or trash in hadoop?

656

Knox and Hadoop Development Tools?

879

What are sink processors?

865

Explain Erasure Coding in Apache Hadoop?

696

How can we check whether namenode is working or not?

621

Main Components of Hadoop?

726

Are Namenode and job tracker on the same host?

1407

Why is hadoop faster?

600

What infrastructure do we need to process 100 TB data using Hadoop?

960

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1067

Who is a 'user' in HDFS?

847

Whats is distributed cache in hadoop?

636

How to change Replication Factor For below cases ?

1033

What are the core components of Apache Hadoop?

725

How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?

652

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