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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

What is safe mode in Hadoop?

961

What is MapFile?

964

What do you understand from Node redundancy and is it exist in hadoop cluster?

1231

What happens to a NameNode that has no data?

1585

What is a heartbeat in HDFS?

917

What are sink processors?

910

Does hadoop always require digital data to process?

1181

what is meaning Replication factor?

950

What is the purpose of RawComparator interface?

1128

Where is the Mapper Output stored?

1374

What is the function of ApplicationMaster?

966

What problems can be addressed by using Zookeeper?

941

What is Hadoop streaming?

1046

Is client the end user in HDFS?

978

Can the balancer be run while Hadoop is in use?

975


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Un-Answered Questions { Apache Hadoop }

What is Apache Hadoop?

852


What is the difference between rdbms and hadoop?

645


Did you ever ran into a lop sided job that resulted in out of memory error

1220


What do you mean by taskinstance?

746


What are the default configuration files that are used in hadoop?

691


How to exit the vi editor?

732


How many JVMs run on a slave node?

1044


Explain the use of tasktracker in the hadoop cluster?

633


What is oozie in hadoop?

672


Explain what if rack 2 and datanode fails?

636


Is hadoop based on google mapreduce?

691


What is Rack Awareness in Apache Hadoop?

811


How does a namenode handle the failure of the data nodes?

691


Which data storage components are used by hadoop?

666


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

1075