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?

120

what is SStable consist of?

How to exit the vi editor?

693

Does the hdfs client decide the input split or namenode?

619

Which files are used by the startup and shutdown commands?

658

What is cloudera and why it is used?

760

What is a spill factor with respect to the ram?

817

Can we have multiple entries in the master files?

652

On which port does ssh work?

691

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

683

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

668

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

644

How can we look for the namenode in the browser?

676

What do slaves consist of?

618

How can we check whether namenode is working or not?

619

Un-Answered Questions { Hadoop }

How do you define "block" in HDFS?

855

Is it necessary to start Hadoop to run any Apache Spark Application ?

262

How can we see all the clusters that are available in Ambari?

143

What is the purpose of retention period in Kafka cluster?

621

Explain first() operation in Apache Spark RDD?

350

How we can take Hadoop out of Safe Mode?

824

How to write 'foreach' statement for map datatype in pig scripts?

610

what are the basic parameters of a Mapper?

778

Explain what is logging in Cassandra?

How to write 'foreach' statement for bag datatype in pig scripts?

642

How does the Pig platform handle relational systems data?

499

What is spark catalyst?

280

How to copy file from HDFS to local?

How many Daemon processes run on a Hadoop system?

1060

What are collection data types in Hive?

668

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