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 change from su to cloudera?

719

Why password is needed in ssh localhost?

803

What happens to a namenode, when job tracker is down?

753

What does the command mapred.job.tracker do?

779

How to come out of the insert mode?

787

What is the full form of fsck?

702

Why do we need a password-less ssh in fully distributed environment?

709

Can you give us some more details about ssh communication between masters and the slaves?

703

Can you tell us more about ssh?

716

How does master slave architecture in the hadoop?

815

Explain the wordcount implementation via hadoop framework ?

724

What is hadoop framework?

722

What is partioner in hadoop? Where does it run,mapper or reducer?

673

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

615

How to enable recycle bin in hadoop?

766

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Un-Answered Questions { Apache Hadoop }

What happens in a textinputformat?

658

Does Hadoop requires RAID?

945

Explain the wordcount implementation via hadoop framework ?

724

How does NameNode tackle DataNode failures?

1173

Can hive run without hadoop?

672

What's the best way to copy files between HDFS clusters?

1358

shouldn't DFS be able to handle large volumes of data already?

1067

Define a combiner?

649

How did you debug your Hadoop code ?

1370

What is Rack awareness?

999

What is the purpose of dfsadmin tool?

1247

What does the command mapred.job.tracker do?

779

What is Schema on Read and Schema on Write?

916

Why is Apache Spark faster than Apache Hadoop?

842

What is Hadoop streaming?

1046

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