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?

1388

Can Apache Kafka be used without Zookeeper?

1077

What is Your Cluster size ?

1465

What is the default block size in hdfs?

1077

What are active and passive "NameNodes"?

1505

What are combiners and its purpose?

966

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

1294

Can Hadoop be compared to NOSQL database like Cassandra?

952

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

1062

What is the difference between SQL and NoSQL?

1129

What are the additional benefits YARN brings in to Hadoop?

1005

what are the steps involved in decommissioning removing

1061

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

1445

What is difference between split and block in hadoop?

1429

How many JVMs run on a slave node?

1084

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Un-Answered Questions { Apache Hadoop }

What is the functionality of jobtracker in hadoop?

763

Whats is distributed cache in hadoop?

706

What is NoSQL?

959

Explain what is the purpose of RecordReader in Hadoop?

782

What is unstructured data?

700

Explain the use of tasktracker in the hadoop cluster?

672

What are sink processors?

942

Why do we need a password-less ssh in fully distributed environment?

747

Virtual Box & Ubuntu Installation?

1035

What do the master class and the output class do?

700

What happens to job tracker when namenode is down?

715

Can you tell us more about ssh?

753

Is hadoop open source?

743

What is salary of hadoop developer?

725

How to use Apache Zookeeper command line interface?

1193

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