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?

1159

What ate the key components of Hive Architecture?

854

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

897

What is Hive query processor?

919

Explain the need for MapReduce while programming in Apache Pig?

770

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

630

What are the different pig data types?

744

Explain about the different complex data types in Pig?

652

What is a relation in Pig?

712

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

765

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

642

What is the use of having Filters in Apache Pig ?

703

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

665

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

699

What are the various diagnostic operators available in Apache Pig?

735

Un-Answered Questions { Hadoop }

Explain the process to trigger automatic clean-up in Spark to manage accumulated metadata.

308

How to invoke Command Line Interface?

What is a topic in kafka?

478

What is the best practice on deciding the number of column families for HBase table?

168

What are the cases where Apache Spark surpasses Hadoop?

283

What is a rack awareness algorithm?

What is the difference betwaeen mapreduce engine and hdfs cluster?

Explain what happens in text format?

573

How will you update the rows that are already exported?

What is the role of “ambari-qa” user?

Does impala use caching?

How should you handle session_expired?

Why lazy evaluation is good in spark?

289

What happens when a datanode fails ?

776

State some command line options?

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