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?

1320

Can Apache Kafka be used without Zookeeper?

975

What is Your Cluster size ?

1395

What is the default block size in hdfs?

985

What are active and passive "NameNodes"?

1400

What are combiners and its purpose?

883

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

1213

Can Hadoop be compared to NOSQL database like Cassandra?

856

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

985

What is the difference between SQL and NoSQL?

1006

What are the additional benefits YARN brings in to Hadoop?

890

what are the steps involved in decommissioning removing

973

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

1369

What is difference between split and block in hadoop?

1350

How many JVMs run on a slave node?

980

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Un-Answered Questions { Apache Hadoop }

What are the problems with Hadoop 1.0?

992

How to resolve IOException: Cannot create directory

968

What are the different methods to run Spark over Apache Hadoop?

673

What is the jobtracker and what it performs in a hadoop cluster?

603

What is HDFS High Availability?

921

Explain the Job OutputFormat?

913

what should be the ideal replication factor in hadoop?

615

Is it necessary to write jobs for hadoop in the java language?

621

Why is hadoop faster?

597

What do you know about sequencefileinputformat?

594

Is hadoop a database?

627

when hadoop enter in safe mode?

690

Explain the features of pseudo mode?

658

what is a datanode?

882

How can one increase replication factor to a desired value in Hadoop?

1080

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