Apache Hadoop Interview Questions
Questions Answers Views Company eMail

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

1030

Can Apache Kafka be used without Zookeeper?

793

What is Your Cluster size ?

1244

What is the default block size in hdfs?

831

What are active and passive "NameNodes"?

1191

What are combiners and its purpose?

747

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

1101

Can Hadoop be compared to NOSQL database like Cassandra?

743

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

847

What is the difference between SQL and NoSQL?

777

What are the additional benefits YARN brings in to Hadoop?

735

what are the steps involved in decommissioning removing

824

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

1227

What is difference between split and block in hadoop?

1190

How many JVMs run on a slave node?

781


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Un-Answered Questions { Apache Hadoop }

What do the master class and the output class do?

491


What is HDFS ? How it is different from traditional file systems?

748


Define streaming access?

487


What is keyvaluetextinputformat?

535


How hdfa differs with nfs?

492


What is the difference between traditional RDBMS and Hadoop?

960


What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

827


Define a job tracker?

504


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

479


What do you know about sequencefileinputformat?

453


How many Daemon processes run on a Hadoop system?

926


what is difference between int and intwritable?

1199


what is meaning Replication factor?

762


Is hadoop obsolete?

476


What other technologies have you used in hadoop sta ck?

813