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 to enable trash/recycle bin in hadoop?

769

What is small file problem in hadoop?

821

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

730

What exactly is hadoop?

725

Can we do online transactions(oltp) using hadoop?

707

Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?

731

What is output format in hadoop?

727

How to enable/configure the compression of map output data in hadoop?

821

What hadoop does in safe mode?

697

What is inputformat in hadoop?

791

Explain how input and output data format of the hadoop framework?

746

when hadoop enter in safe mode?

790

How to enable recycle bin or trash in hadoop?

732

Whats is distributed cache in hadoop?

710

what should be the ideal replication factor in hadoop?

693

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Un-Answered Questions { Apache Hadoop }

Explain why the name ‘hadoop’?

747

Explain Erasure Coding in Apache Hadoop?

793

Which is the best hadoop certification?

709

What do the master class and the output class do?

701

What are the problems with Hadoop 1.0?

1092

What is unstructured data?

702

How many JVMs run on a slave node?

1088

Can you tell us more about ssh?

756

What is Hadoop streaming?

1080

Explain the features of pseudo mode?

751

how is a file of the size 1 GB uncompressed

961

Name some companies that use Hadoop?

999

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

1050

How to resolve IOException: Cannot create directory

1068

Is client the end user in HDFS?

1007

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