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 is the difference between Hadoop and Traditional RDBMS?

956

What is Partioner in hadoop? Where does it run

1024

Does Hadoop requires RAID?

990

What is the purpose of DataNode block scanner?

1013

What is a checkpoint?

1008

Did you ever ran into a lop sided job that resulted in out of memory error

1278

What is the communication channel between client and namenode/datanode?

1769

What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?

1212

What is the problem with HDFS and streaming data like logs

1062

What is the Use of SSH in Hadoop ?

993

What infrastructure do we need to process 100 TB data using Hadoop?

1048

What is the difference between a Hadoop and Relational Database and Nosql?

1109

What is Schema on Read and Schema on Write?

944

What is the difference between traditional RDBMS and Hadoop?

1202

What is the main purpose of HDFS fsck command?

1844

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Un-Answered Questions { Apache Hadoop }

What is the heartbeat used for?

1081

How many Daemon processes run on a Hadoop system?

1132

How did you debug your Hadoop code ?

1411

How can I install Cloudera VM in my system?

1011

What is inputsplit in hadoop? Explain.

837

What is a checkpoint?

1008

How hdfa differs with nfs?

779

What is zookeeper in hadoop?

688

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

1391

How to resolve small file problem in hdfs?

1021

What is Derby database?

955

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

754

Give the use of the bootstrap panel.

707

Explain the features of stand alone (local) mode?

672

What will you do when NameNode is down?

1055

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