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?

554

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

528

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

534

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

510

How can we look for the namenode in the browser?

537

What do slaves consist of?

506

How can we check whether namenode is working or not?

491

What happens to job tracker when namenode is down?

517

How can I restart namenode?

534

What do masters consist of?

514

What if a namenode has no data?

510

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

493

What is formatting of the dfs?

588

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

526

Does this lead to security issues?

537

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Un-Answered Questions { Apache Hadoop }

How can you overwrite the replication factors in HDFS?

1048

Is it necessary to write jobs for hadoop in the java language?

521

Can the balancer be run while Hadoop is in use?

780

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

835

How the HDFS Blocks are replicated?

790

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

526

How to enable recycle bin or trash in hadoop?

539

Is map like a pointer?

774

How to change from su to cloudera?

533

what are the steps involved in commissioning adding

740

What is the use of Combiner?

809

What is the use of combiners in the hadoop framework?

474

Is hadoop obsolete?

480

What are the hadoop's three configuration files?

511

What are the two main components of ResourceManager?

920

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