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?

1111

What ate the key components of Hive Architecture?

810

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

849

What is Hive query processor?

870

Explain the need for MapReduce while programming in Apache Pig?

753

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

608

What are the different pig data types?

702

Explain about the different complex data types in Pig?

626

What is a relation in Pig?

675

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

736

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

619

What is the use of having Filters in Apache Pig ?

674

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

621

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

662

What are the various diagnostic operators available in Apache Pig?

701

Un-Answered Questions { Hadoop }

Explain the term paired RDD in Apache Spark?

383

What are the file formats that Hive supports and can use be used for storage?

830

Explain about trformations and actions in the context of rdds?

296

What do sorting and shuffling do?

655

Where can I find impala documentation?

How can you send some messages in kafka?

472

What size is recommended for each node?

214

Explain in brief what is the architecture of Spark?

290

How data or a file is written into hdfs?

What is atom in pig?

512

Explain the usage of Context Object?

442

Explain SparkContext in Apache Spark?

314

Explain the zookeeper workflow?

What is the difference between SQL and NoSQL?

1018

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1072

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