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?

874

What is Partioner in hadoop? Where does it run

925

Does Hadoop requires RAID?

889

What is the purpose of DataNode block scanner?

884

What is a checkpoint?

921

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

1166

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

1687

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

1122

What is the problem with HDFS and streaming data like logs

968

What is the Use of SSH in Hadoop ?

919

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

955

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

1026

What is Schema on Read and Schema on Write?

863

What is the difference between traditional RDBMS and Hadoop?

1127

What is the main purpose of HDFS fsck command?

1717

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Un-Answered Questions { Apache Hadoop }

Is it necessary to know java to learn hadoop?

612

What does the command mapred.job.tracker do?

718

what is a datanode?

880

Define a task tracker?

605

What is compute and Storage nodes?

985

How to resolve IOException: Cannot create directory

967

What is the port number for NameNode

797

What do masters consist of?

646

Whats is distributed cache in hadoop?

633

Is hadoop a memory?

651

What is a spill factor with respect to the ram?

812

What are different hdfs dfs shell commands to perform copy operation?

1010

Explain how is hadoop different from other data processing tools?

679

What is the default replication factor?

944

What do you know about keyvaluetextinputformat?

558

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