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?

1318

Can Apache Kafka be used without Zookeeper?

970

What is Your Cluster size ?

1392

What is the default block size in hdfs?

981

What are active and passive "NameNodes"?

1397

What are combiners and its purpose?

881

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

1210

Can Hadoop be compared to NOSQL database like Cassandra?

853

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

980

What is the difference between SQL and NoSQL?

1006

What are the additional benefits YARN brings in to Hadoop?

888

what are the steps involved in decommissioning removing

970

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

1365

What is difference between split and block in hadoop?

1347

How many JVMs run on a slave node?

980

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Un-Answered Questions { Apache Hadoop }

What is zookeeper in hadoop?

604

On what basis data will be stored on a rack?

1070

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

673

Is fs.mapr.working.dir a single directory?

642

What exactly is hadoop?

641

Define a combiner?

603

How to enable recycle bin in hadoop?

709

What is the InputFormat ?

957

Input Split & Record Reader and what they do?

968

what are the nodes in the Hadoop cluster?

998

How to change replication factor of files already stored in HDFS?

956

Is hadoop open source?

680

What is Rack Awareness in Apache Hadoop?

745

How many instances of tasktracker run on a hadoop cluster?

634

How can we check whether namenode is working or not?

614

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