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

when you can use Alter keyspace?

122

what is SStable consist of?

How to exit the vi editor?

733

Does the hdfs client decide the input split or namenode?

671

Which files are used by the startup and shutdown commands?

720

What is cloudera and why it is used?

797

What is a spill factor with respect to the ram?

865

Can we have multiple entries in the master files?

694

On which port does ssh work?

740

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

727

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

712

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

683

How can we look for the namenode in the browser?

717

What do slaves consist of?

667

How can we check whether namenode is working or not?

659

Un-Answered Questions { Hadoop }

What is a tuple?

1191

How did you debug your Hadoop code ?

1371

What is a primary key? And what are it’s different types?

If the hadoop administrator needs to make a change, which configuration file does he need to change?

442

How many instances of JobTracker can run on a Hadoop Cluser?

1022

What do you understand by the parquet file?

280

What is the role of the offset.

514

What are the collection data types provided by CQL?

What is the purpose of context object?

431

Clarify what webdav is in hadoop?

471

What is the primary objective of NoSQL databases?

What is spark pipeline?

291

What is job tracker role in hadoop?

474

How would an hadoop administrator deploy various components of hadoop in production?

422

What is Counter in MapReduce?

676

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