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?

856

How to optimize Hive Performance?

719

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

709

Explain Hive Thrift server?

701

Differentiate between PigLatin and Hive?

694

How is HCatalog different from Hive?

688

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

673

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

799

How to Write a UDF function in Hive?

705

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

737

What is the importance of .hiverc file?

867

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

758

What is a generic UDF in the hive?

758

How many types of Tables in Hive?

794

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

787

Un-Answered Questions { Hadoop }

Whats the default port that jobtrackers listens ?

479

What does the “USE” command in the hive do?

702

How can one copy a file into HDFS with a different block size to that of existing block size configuration?

What is Purpose to Validate in Sqoop?

Is it possible to create cartesian join between 2 tables, using hive?

686

How will you explain COGROUP in Pig?

634

Mention how many operational commands in hbase?

290

Compare Hadoop 2 and Hadoop 3?

425

What is rack awareness in hadoop?

489

What are different tombstone markers in hbase?

156

Why is pig used in hadoop?

579

What is difference between flume and kafka?

What are the exception handling operators in Pig script?

580

Why MapReduce uses the key-value pair to process the data?

639

What is flume instagram?

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