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 the difference between TextInputFormat and KeyValueInputFormat class?

544

What is High Availability feature in Hadoop2?

479

What is the command to change the replication factor ?

548

What is JobTracker?

479

How many datanodes can run on a single Hadoop cluster?

484

What are some typical functions of Job Tracker?

477

What is TaskTracker?

520

Give a brief overview of Hadoop history?

466

How Big is ‘Big Data’?

461

How can you set an arbitrary number of mappers to be created for a job in Hadoop?

500

How many job tracker processes can run on a single Hadoop cluster?

514

What are some of the characteristics of Hadoop framework?

486

Where are Hadoop’s configuration files located?

548

Can you give a detailed overview about the Big Data being generated by Facebook?

481

How to remove safemode of namenode forcefully in HDFS?

Un-Answered Questions { Hadoop }

Does spark require hdfs?

300

What are barriers?

What are the different Eval functions available in Pig?

599

Double type in Hive - Important points?

723

What is the role of “ambari-qa” user?

What are different modes of metastore deployment in Hive?

734

Enlist the several components in Kafka?

706

What platform and java version are required to run hadoop?

733

Explain how you can improve the throughput of a remote consumer?

587

What are all stats classes in the org.apache.pig.tools.pigstats package?

607

What is difference between spark and mapreduce?

295

What is the use of mysql connector?

Why do people use spark?

288

what is the traditional method of message transfer?

718

Why should we use presto?

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