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?

1390

Can Apache Kafka be used without Zookeeper?

1080

What is Your Cluster size ?

1467

What is the default block size in hdfs?

1079

What are active and passive "NameNodes"?

1506

What are combiners and its purpose?

969

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

1295

Can Hadoop be compared to NOSQL database like Cassandra?

955

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

1063

What is the difference between SQL and NoSQL?

1130

What are the additional benefits YARN brings in to Hadoop?

1008

what are the steps involved in decommissioning removing

1065

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

1446

What is difference between split and block in hadoop?

1433

How many JVMs run on a slave node?

1088

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Un-Answered Questions { Apache Hadoop }

What problems can be addressed by using Zookeeper?

978

What is the InputFormat ?

1058

Is map like a pointer?

948

What are the most commonly defined input formats in Hadoop?

1099

How does an hadoop application look like or their basic components?

766

How is the option in Hadoop to skip the bad records?

981

How can I restart namenode?

756

What are different types of filesystem?

1175

What is formatting of the dfs?

857

On what basis data will be stored on a rack?

1175

what is a datanode?

972

What is cloudera and why it is used?

833

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

709

What are the main components of a Hadoop Application?

1079

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

664

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