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?

746

How hdfa differs with nfs?

741

How a task is scheduled by a jobtracker?

674

How many maximum jvm can run on a slave node?

686

What are the two main parts of the hadoop framework?

669

What is the use of combiners in the hadoop framework?

617

What is the jobtracker?

633

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

637

How many instances of tasktracker run on a hadoop cluster?

679

Explain the use of tasktracker in the hadoop cluster?

633

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

691

What do you know about sequencefileinputformat?

632

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

640

Why the name ‘hadoop’?

612

What do you know about nlineoutputformat?

684

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Un-Answered Questions { Apache Hadoop }

What does the command mapred.job.tracker do?

777

What is formatting of the dfs?

828

Who invented hadoop?

685

What are the additional benefits YARN brings in to Hadoop?

963

what are Task Tracker and Job Tracker?

1071

What is compute and Storage nodes?

1024

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

691

What do slaves consist of?

667

What is HDFS Federation?

983

What is rack-aware replica placement policy?

1026

What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?

1112

Explain use cases where SequenceFile class can be a good fit?

941

How would you tackle counting words in several text documents?

1022

How to enable recycle bin or trash in hadoop?

706

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

643

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