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

What is HDFS block size and what did you chose in your project?

1017

What is HDFS High Availability?

1019

What are different types of filesystem?

1182

how can we change Replication Factor?

1075

What is Hive Present Version ?

1136

What is the purpose of Hive Driver?

1101

In which scenario Hive is good fit?

1025

Can i access Hive Without Hadoop ?

1 2759

What is difference between internal and external tables in hive?

1 2498

When Hive is run in embedded mode

1922

Can you execute Hadoop dfs Commands from Hive CLI? How?

1203

List the various options available with the Hive command?

951

Why Mapreduce output written in local disk?

1065

What is identity mapper and reducer? In which cases can we use them?

1045

Is YARN a replacement of Hadoop MapReduce?

1 2104

Un-Answered Questions { Hadoop }

What is apache spark architecture?

335

Does spark use tez?

312

What are the relation operations in Pig? Explain any two with examples?

759

What is rdd partition?

334

Why should we use ‘orderby’ keyword in pig scripts?

582

what is Bloom Filter is used for in Cassandra?

118

Can MapReduce program be written in any language other than Java?

974

what does the text input format do?

863

What is the heartbeat used for?

1085

What are the various libraries available on top of Apache Spark?

326

What is the significance of ‘IF EXISTS” clause while dropping a table?

760

Explain Erasure Coding in Apache Hadoop?

801

Name Applications and Use Cases of HCatalog?

Name the scalar data type and complex data types in Pig?

708

How does apache spark work?

308

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