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

Explain bucketing in Hive?

890

How to optimize Hive Performance?

760

What is the difference between CREATE TABLE AND CREATE EXTERNAL TABLE?

744

Explain Hive Thrift server?

731

Differentiate between PigLatin and Hive?

736

How is HCatalog different from Hive?

722

Which java class handles the output record encoding into files which result from Hive queries?

710

What is the significance of the line set hive.mapred.mode = strict;?

859

How to Write a UDF function in Hive?

739

Which java class handles the Input record encoding into files which store the tables in Hive?

778

What is the importance of .hiverc file?

897

When you point a partition of a hive table to a new directory, what happens to the data?

803

What is a generic UDF in the hive?

796

How many types of Tables in Hive?

839

What is the maximum size of string data type supported by Hive?

826

Un-Answered Questions { Hadoop }

What are the different String functions available in pig?

852

Define a sequence file in hadoop?

579

Can you join multiple fields in Apache

575

What is the significance of Sliding Window operation?

320

What is difference between Column and Super Column?

How can it help for avoiding costly modeling?

What is regionserver?

181

What is hadoop spark?

319

What are combiners? When should I use a combiner in my MapReduce Job?

951

How does a namenode handle the failure of the data nodes?

737

Differentiate HDFS & HBase?

Can I run Apache Spark without Hadoop?

302

What are the default configuration files that are used in hadoop?

731

State some applications of HBase?

173

What is namenode?

518

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