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Hadoop Interview Questions
Questions Answers Views Company eMail

Is it important for Hadoop MapReduce jobs to be written in Java?

900

what job does the conf class do?

847

What is the key- value pair in Hadoop MapReduce?

737

What is InputFormat in Hadoop MapReduce?

729

What are the various InputFormats in Hadoop?

699

Explain InputSplit in Hadoop MapReduce?

730

How much space will the split occupy in Mapreduce?

729

What is a RecordReader in Hadoop MapReduce?

724

What is the difference between HDFS block and input split?

949

How to write MapReduce Programs?

765

What is Apache Hive?

878

What kind of applications is supported by Apache Hive?

860

How can you configure remote metastore mode in Hive?

880

What is indexing and why do we need it?

858

What is the use of Hcatalog?

1001


Un-Answered Questions { Hadoop }

What is the difference between apache mahout and spark mllib ?

57


Describe HDFS Federation?

52


What are the features of apache cassandra?

75


Explain HCatLoader APIs?

5


What does secondary name-node means?

485


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

651


How is impala metadata managed?

44


When to use Cassandra?

128


How does cassandra perform read operation? Explain

95


What are the side data distribution techniques?

529


Does the HDFS go wrong? If so, how?

56


what is the traditional method of message trfer?

612


What is the problem in having lots of small files in hdfs?

58


Why spark is faster than hive?

322


If DataNode increases, then do we need to upgrade NameNode?

591