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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

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

 801

Can Apache Kafka be used without Zookeeper?

 667

What is Your Cluster size ?

 1131

What is the default block size in hdfs?

 717

What are active and passive "NameNodes"?

 1055

What are combiners and its purpose?

 624

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

 1009

Can Hadoop be compared to NOSQL database like Cassandra?

 644

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

 706

What is the difference between SQL and NoSQL?

 656

What are the additional benefits YARN brings in to Hadoop?

 636

what are the steps involved in decommissioning removing

 689

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

 1117

What is difference between split and block in hadoop?

 1078

How many JVMs run on a slave node?

 642

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Un-Answered Questions { Apache Hadoop }

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

1117

Explain the difference between gen1 and gen2 hadoop with regards to the namenode?

389

What does job conf class do?

379

What if rack 2 and datanode fails?

785

What are different hdfs dfs shell commands to perform copy operation?

788




What are the Basics of Hadoop?

662

Explain why the name ‘hadoop’?

380

How to enable recycle bin or trash in hadoop?

445

Explain how is hadoop different from other data processing tools?

391

Why is Apache Spark faster than Apache Hadoop?

432

Can Apache Kafka be used without Zookeeper?

667

What is the default block size in hdfs?

717

Explain what happens in textinformat ?

485

How does NameNode tackle DataNode failures?

869

What is the default replication factor?

679

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