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

How do you categorize a big data?

779

What is inputsplit in hadoop? Explain.

790

What platform and java version are required to run hadoop?

694

What is the functionality of jobtracker in hadoop?

718

What are the hadoop's three configuration files?

696

What is map/reduce job in hadoop?

642

What is the difference between input split and hdfs block?

Mention some important features of spm in cassandra?

113

What is the use of cassandra cql collection?

Mention some important components of cassandra data models?

What is the role of alter keyspace?

What is hadoop, hbase, hive and cassandra? Specify similarities and differences among them.

126

Explain cassandra.

Where cassandra stores its data?

What do you mean by cassandra-cqlsh?

Un-Answered Questions { Hadoop }

What is the use of apache mahout?

What happened after creating a table in hive ?

731

How can you send some messages in kafka?

504

Since the data is replicated thrice in hdfs, does it mean that any calculation done on one node will also be replicated on the other two?

What do you mean by a bag in Pig?

987

Describe Replication Factor?

Explain what is zookeeper in kafka? Can we use kafka without zookeeper?

537

What are the independent extensions that contributed to the ambari codebase?

What is SequenceFileInputFormat?

823

What is a "Spark Executor"?

349

What is spark code?

315

What do you mean by schema on reading?

713

The partition of hive table has been modified to point to a new directory location. Do I have to move the data to the new location or the data will be moved automatically to the new location?

1000

How would you check whether your NameNode is working or not?

420

How does spark program work?

276

For More Un-Answered { Hadoop } Questions Click Here