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?

568

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

535

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

550

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

520

How can we look for the namenode in the browser?

551

What do slaves consist of?

518

How can we check whether namenode is working or not?

501

What happens to job tracker when namenode is down?

528

How can I restart namenode?

546

What do masters consist of?

532

What if a namenode has no data?

524

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

499

What is formatting of the dfs?

602

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

536

Does this lead to security issues?

545

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Un-Answered Questions { Apache Hadoop }

What is speculative execution in Hadoop?

906

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

535

Define streaming access?

514

What are the main components of a Hadoop Application?

872

What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

566

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1089

What does /var/hadoop/pids do?

1099

What is the difference between hadoop and other data processing tools?

525

what is difference between int and intwritable?

1232

Explain InputFormat?

854

What is a task instance in hadoop? Where does it run?

475

What is Hadoop streaming?

860

What will you do when NameNode is down?

775

What does /etc /init.d do?

540

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

510

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