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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

Define streaming?

699

What is keyvaluetextinputformat?

768

Define a commodity hardware? Does commodity hardware include ram?

774

Explain the hadoop configuration files at present?

696

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

762

Explain why the name ‘hadoop’?

747

Define a combiner?

695

Explain the master class and the output class do?

687

Explain the features of stand alone (local) mode?

669

Name the examples of some companies that are using hadoop structure?

724

What is structured data?

688

Define streaming access?

702

Define fault tolerance?

695

What do sorting do?

715

What is nlineoutputformat?

715

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Un-Answered Questions { Apache Hadoop }

Which are the three main hdfs-site.xml properties?

705

What is the difference between rdbms and hadoop?

674

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

1111

Do we need to give a password, even if the key is added in ssh?

764

How many JVMs run on a slave node?

1088

explain Metadata in Namenode?

979

What is a checkpoint?

1005

How to Administering Hadoop?

948

What is Apache Hadoop? Why is Hadoop essential for every Big Data application?

959

What is formatting of the dfs?

857

What platform and java version are required to run hadoop?

727

Why password is needed in ssh localhost?

845

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

730

What do you know about nlineoutputformat?

732

What is a namenode? How many instances of namenode run on a hadoop cluster?

691

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