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?

694

How hdfa differs with nfs?

682

How a task is scheduled by a jobtracker?

632

How many maximum jvm can run on a slave node?

640

What are the two main parts of the hadoop framework?

609

What is the use of combiners in the hadoop framework?

584

What is the jobtracker?

594

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

606

How many instances of tasktracker run on a hadoop cluster?

640

Explain the use of tasktracker in the hadoop cluster?

605

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

644

What do you know about sequencefileinputformat?

596

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

594

Why the name ‘hadoop’?

581

What do you know about nlineoutputformat?

648

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Un-Answered Questions { Apache Hadoop }

How to change replication factor of files already stored in HDFS?

959

What are the problems with Hadoop 1.0?

996

What is Input Split in hadoop?

921

what is the typical block size of an HDFS block?

866

What are the basic available commands in Hadoop sqoop ?

917

What are channel selectors?

960

What is MapFile?

929

What is the purpose of button groups?

697

What is the difference between HDFS and NAS ?

1319

What is a task instance in hadoop? Where does it run?

584

Where is the Mapper Output stored?

1337

What happens to a NameNode that has no data?

1543

How to change from su to cloudera?

676

What other technologies have you used in hadoop sta ck?

934

What is the InputFormat ?

965

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