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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

What is the difference between Hadoop and Traditional RDBMS?

377

What is Partioner in hadoop? Where does it run

347

Does Hadoop requires RAID?

364

What is the purpose of DataNode block scanner?

374

What is a checkpoint?

374

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

639

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

823

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

591

What is the problem with HDFS and streaming data like logs

387

What is the Use of SSH in Hadoop ?

370

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

433

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

426

What is Schema on Read and Schema on Write?

369

What is the difference between traditional RDBMS and Hadoop?

499

What is the main purpose of HDFS fsck command?

994


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Un-Answered Questions { Apache Hadoop }

Define a datanode?

98


Whats is distributed cache in hadoop?

110


What is hadoop framework?

104


Define streaming?

98


Can hive run without hadoop?

100






What is a spill factor with respect to the ram?

108


Which are the two types of 'writes' in HDFS?

631


What are combiners and its purpose?

340


What are the core components of Apache Hadoop?

137


What is Apache Hadoop YARN?

884


Define a job tracker?

102


What is the problem with small files in Apache Hadoop?

142


Explain the core components of hadoop?

105


What exactly is hadoop?

129


What is the default replication factor?

373