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 MapReduce?

1 1095

What MapReduce framework consists of?

757

Can we submit the mapreduce job from slave node?

834

How can we control particular key should go in a specific reducer?

634

How can you add the arbitrary key-value pairs in your mapper?

974

What is Reduce only jobs?

1 940

What is a IdentityMapper and IdentityReducer in MapReduce ?

629

Explain Working of MapReduce?

653

Write a Mapreduce Program for Character Count ?

699

how to proceed to write your first mapreducer program?

1019

How to set the number of reducers?

1025

Developing a MapReduce Application?

646

Different ways of debugging a job in MapReduce?

795

Explain the Reducer's reduce phase?

695

Why do we use HDFS for applications having large data sets and not when there are lot of small files?

1 2088

Un-Answered Questions { Hadoop }

What are the hadoop configuration files at present?

239

How does spark run hadoop?

190

What is the function of HMaster?

147

What is Cassandra Query Language?

What does it indicate if replica stays out of ISR for a long time?

450

How should you handle session_expired?

What is ObjectInspector functionality?

478

What are the main methods of data transferring in hadoop sqoop?

What is IdentityMapper?

639

What is the default partition in spark?

199

Which all languages Apache Spark supports?

236

How do I set up flume agent?

Can a spark cause a fire?

206

How do I download apache mahout?

Why spark is faster than hadoop?

165

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