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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What happens to job tracker when namenode is down?

673

How can I restart namenode?

722

What do masters consist of?

694

What if a namenode has no data?

667

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

665

What is formatting of the dfs?

829

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

737

Does this lead to security issues?

740

How to change from su to cloudera?

719

Why password is needed in ssh localhost?

803

What happens to a namenode, when job tracker is down?

753

What does the command mapred.job.tracker do?

779

How to come out of the insert mode?

787

What is the full form of fsck?

702

Why do we need a password-less ssh in fully distributed environment?

709

Un-Answered Questions { Hadoop }

What is LazyOutputFormat in MapReduce?

684

Explain apache kafka?

518

Mention what is rack awareness?

381

How do I start a spark server?

298

What is pagerank in graphx?

284

Explain why the name ‘hadoop’?

708

What is fsck?

643

What is the difference between RDBMS with Hadoop MapReduce?

798

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

How can client interact with Hive?

700

What are the different Complex Data Types available in Hive?

904

Does spark store data?

289

How to create hadoop archive?

419

What is the role zookeeper plays in a cluster of kafka?

496

What are the 2 modes used to run pig scripts?

620

For More Un-Answered { Hadoop } Questions Click Here