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?

790

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

766

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

753

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

718

How can we look for the namenode in the browser?

752

What do slaves consist of?

711

How can we check whether namenode is working or not?

701

What happens to job tracker when namenode is down?

718

How can I restart namenode?

758

What do masters consist of?

721

What if a namenode has no data?

705

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

708

What is formatting of the dfs?

860

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

775

Does this lead to security issues?

772

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Un-Answered Questions { Apache Hadoop }

What's the best way to copy files between HDFS clusters?

1391

What is Disk Balancer in Apache Hadoop?

943

How can we change the split size if our commodity hardware has less storage space?

710

What are the four characteristics of Big Data?

759

What is high availability in hadoop?

712

What are the main components of a Hadoop Application?

1080

What are the important differences between apache and hadoop?

734

what is SPF?

1555

How is the distance between two nodes defined in Hadoop?

1497

What is Schema on Read and Schema on Write?

944

What is a block and block scanner in HDFS?

1061

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

692

Define a task tracker?

688

Explain the benefits of block transfer?

860

Input Split & Record Reader and what they do?

1077

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