Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

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

708

How is hadoop different from other data processing tools?

707

What happens in a textinputformat?

698

Can you explain how do ‘map’ and ‘reduce’ work?

766

Can we call vms as pseudos?

684

What do the master class and the output class do?

700

What does job conf class do?

700

What do you know about keyvaluetextinputformat?

632

Define a namenode?

702

Explain the hadoop-core configuration?

729

Explain the benefits of block transfer?

857

Define a task tracker?

687

Define a metadata?

691

Define a daemon?

710

Explain the core components of hadoop?

691

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Un-Answered Questions { Apache Hadoop }

what is the typical block size of an HDFS block?

948

explain Metadata in Namenode?

977

What alternate way does HDFS provides to recover data in case a Namenode

986

How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?

719

Explain the hadoop-core configuration?

729

Explain why the name ‘hadoop’?

746

What do shuffling do?

713

Can the balancer be run while Hadoop is in use?

1005

What is nlineoutputformat?

714

What is MapFile?

994

What will you do when NameNode is down?

1054

How to enable trash/recycle bin in hadoop?

768

Define a metadata?

691

How to keep HDFS cluster balanced?

1127

Rack awareness of Namenode?

908

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