Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

On which port does ssh work?

689

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

681

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

665

Is fs.mapr.working.dir a single directory?

643

How can we look for the namenode in the browser?

671

What do slaves consist of?

615

How can we check whether namenode is working or not?

615

What happens to job tracker when namenode is down?

630

How can I restart namenode?

663

What do masters consist of?

647

What if a namenode has no data?

626

Which are the three main hdfs-site.xml properties?

613

What is formatting of the dfs?

772

In cloudera there is already a cluster, but if I want to form a cluster on ubuntu can we do it?

677

Does this lead to security issues?

698

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Un-Answered Questions { Apache Hadoop }

What is InputSplit and RecordReader?

878

Input Split & Record Reader and what they do?

969

how would you modify that solution to only count the number of unique words in all the documents?

927

What are the main components of a Hadoop Application?

982

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?

645

What problems have you faced when you are working on Hadoop code?

926

What problems can be addressed by using Zookeeper?

902

What is salary of hadoop developer?

633

How is the distance between two nodes defined in Hadoop?

1422

What is HDFS High Availability?

919

What is the jobtracker?

586

What are sink processors?

864

What is zookeeper in hadoop?

604

How many instances of tasktracker run on a hadoop cluster?

635

Command to format the NameNode?

886

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