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 enable trash/recycle bin in hadoop?

738

What is small file problem in hadoop?

783

What are the default configuration files that are used in hadoop?

691

What exactly is hadoop?

691

Can we do online transactions(oltp) using hadoop?

669

Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?

689

What is output format in hadoop?

683

How to enable/configure the compression of map output data in hadoop?

766

What hadoop does in safe mode?

649

What is inputformat in hadoop?

744

Explain how input and output data format of the hadoop framework?

714

when hadoop enter in safe mode?

744

How to enable recycle bin or trash in hadoop?

706

Whats is distributed cache in hadoop?

678

what should be the ideal replication factor in hadoop?

653

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Un-Answered Questions { Apache Hadoop }

What does /var/hadoop/pids do?

1264

Why do we use Hadoop?

925

What Mapper does?

984

What do you understand from Node redundancy and is it exist in hadoop cluster?

1231

Can Hadoop be compared to NOSQL database like Cassandra?

910

Can you tell us more about ssh?

716

What are the port numbers of namenode, job tracker and task tracker?

712

What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

1075

Why is Apache Spark faster than Apache Hadoop?

842

What is nlineoutputformat?

675

What is a namenode? How many instances of namenode run on a hadoop cluster?

643

What alternate way does HDFS provides to recover data in case a Namenode

955

What do sorting do?

682

Command to format the NameNode?

935

What is the problem with small files in Apache Hadoop?

783

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