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 Pig differs from MapReduce?

799

Why are the number of splits equal to the number of maps?

961

What are the Data types in Pig?

913

What are the two main components of ResourceManager?

1164

MapReduce Types and Formats and Setting up a Hadoop Cluster?

905

How will you make changes to the default configuration files?

963

What are the different types of Znodes?

981

How many instances of JobTracker can run on a Hadoop Cluser?

1022

What's the best way to copy files between HDFS clusters?

1358

Can Apache Kafka be used without Zookeeper?

1035

What is Your Cluster size ?

1439

What is the default block size in hdfs?

1041

What are active and passive "NameNodes"?

1465

It can be possible that a Job has 0 reducers?

965

What are combiners and its purpose?

931

Un-Answered Questions { Hadoop }

Can multiple clients write into an HDFS file concurrently in hadoop?

What is the latest version of ambari that is available in the market and what is the feature that they have added in it?

Name some AVRO Reference APIs?

What is pseudo-distributed mode?

605

What is the use of InputFormat in MapReduce process?

651

Why hive does not store metadata information in hdfs?

939

Name different types of NoSQL database?

Explain tobag function?

553

Do we need hadoop for spark?

297

How can Flume be used with HBase?

117

What is the process of changing the split size if there is limited storage space on Commodity Hardware?

709

Mention what are the three modes in which hadoop can be run?

419

Why do we use ‘filters’ Pig scripts?

613

How does Mappers run method works?

893

Explain about the partitioning, shuffle and sort phase

671

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