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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What do you mean by taskinstance?

790

How hdfa differs with nfs?

777

How a task is scheduled by a jobtracker?

715

How many maximum jvm can run on a slave node?

724

What are the two main parts of the hadoop framework?

701

What is the use of combiners in the hadoop framework?

649

What is the jobtracker?

668

What is the jobtracker and what it performs in a hadoop cluster?

664

How many instances of tasktracker run on a hadoop cluster?

725

Explain the use of tasktracker in the hadoop cluster?

676

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

734

What do you know about sequencefileinputformat?

667

Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

662

Why the name ‘hadoop’?

656

What do you know about nlineoutputformat?

732

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Un-Answered Questions { Apache Hadoop }

Virtual Box & Ubuntu Installation?

1040

What is formatting of the dfs?

857

What are the functionalities of jobtracker?

710

Is hadoop based on google mapreduce?

729

Explain the overview of hadoop history breifly?

651

What is the difference between SQL and NoSQL?

1130

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1347

How does master slave architecture in the hadoop?

875

What is the difference between rdbms and hadoop?

674

What are the core components of Apache Hadoop?

819

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

705

What is Apache Hadoop YARN?

1492

How will format the HDFS ?

1113

explain Metadata in Namenode?

979

What is rack-aware replica placement policy?

1063

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