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 to stop a partition form being queried?

1201

What ate the key components of Hive Architecture?

896

Does Pig give any warning when there is a type mismatch or missing field?

942

What is Hive query processor?

956

Explain the need for MapReduce while programming in Apache Pig?

811

What are the relational operators available related to loading and storing in pig language?

664

What are the different pig data types?

786

Explain about the different complex data types in Pig?

703

What is a relation in Pig?

757

Explain the difference between COUNT_STAR and COUNT functions in Apache Pig?

817

How should 'store' keyword is useful in pig scripts?

679

What is the use of having Filters in Apache Pig ?

742

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

704

What are the basic steps to writing a UDF Function in Pig?

735

What are the various diagnostic operators available in Apache Pig?

773

Un-Answered Questions { Hadoop }

Describe JMX?

What is regionserver?

181

What is HBaseFsck class?

265

How does apache flume work?

136

What is the difference between RDBMS with Hadoop MapReduce?

849

Explain how can you change a column data type in Hive?

744

Mention what is the difference between hdfs and nas?

What is difference between a MapReduce InputSplit and HDFS block

727

Can aluminum cause a spark?

330

Where is spark rdd?

280

Explain what happens in text format?

616

Why do I have to use refresh and invalidate metadata, what do they do?

Can you mention some features of spark?

339

Explain the flatMap() transformation in Apache Spark?

320

What do you understand by the super column in cassandra?

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