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?

774

What is Partioner in hadoop? Where does it run

751

Does Hadoop requires RAID?

773

What is the purpose of DataNode block scanner?

760

What is a checkpoint?

797

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

1047

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

1569

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

1018

What is the problem with HDFS and streaming data like logs

803

What is the Use of SSH in Hadoop ?

781

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

842

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

839

What is Schema on Read and Schema on Write?

740

What is the difference between traditional RDBMS and Hadoop?

966

What is the main purpose of HDFS fsck command?

1523

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Un-Answered Questions { Apache Hadoop }

Can Apache Kafka be used without Zookeeper?

797

What is the problem with small files in Apache Hadoop?

552

How many instances of tasktracker run on a hadoop cluster?

517

What is salary of hadoop developer?

520

Explain the wordcount implementation via hadoop framework ?

511

Knox and Hadoop Development Tools?

753

What are the important differences between apache and hadoop?

536

What are the functionalities of jobtracker?

481

How many Daemon processes run on a Hadoop system?

933

What are watches?

817

Can we call vms as pseudos?

501

What are the two main parts of the hadoop framework?

473

How to enable recycle bin or trash in hadoop?

535

How blocks are distributed among all data nodes for a particular chunk of data?

851

Do we need to give a password, even if the key is added in ssh?

522

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