Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What's the best way to copy files between HDFS clusters?

1324

Can Apache Kafka be used without Zookeeper?

981

What is Your Cluster size ?

1395

What is the default block size in hdfs?

987

What are active and passive "NameNodes"?

1404

What are combiners and its purpose?

883

On what basis Namenode will decide which datanode to write on?

1215

Can Hadoop be compared to NOSQL database like Cassandra?

858

What is a Secondary Namenode? Is it a substitute to the Namenode?

990

What is the difference between SQL and NoSQL?

1011

What are the additional benefits YARN brings in to Hadoop?

894

what are the steps involved in decommissioning removing

973

What is the process to change the files at arbitrary locations in HDFS?

1377

What is difference between split and block in hadoop?

1351

How many JVMs run on a slave node?

992

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Un-Answered Questions { Apache Hadoop }

How many instances of JobTracker can run on a Hadoop Cluser?

975

What is difference between regular file system and HDFS?

998

Does this lead to security issues?

701

What hadoop does in safe mode?

615

How does a namenode handle the failure of the data nodes?

644

What is a Record Reader in hadoop?

914

Explain the features of stand alone (local) mode?

583

Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?

650

What is a “Distributed Cache” in Apache Hadoop?

728

when hadoop enter in safe mode?

690

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

974

What is HDFS High Availability?

926

What is the difference between rdbms and hadoop?

604

How can we change the split size if our commodity hardware has less storage space?

626

What is DistributedCache and its purpose?

871

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