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Hadoop Interview Questions
Questions Answers Views Company eMail

Explain map-only job?

559

What is KeyValueTextInputFormat in Hadoop?

582

What happen if number of reducer is set to 0 in Hadoop?

531

What is TextInputFormat in Hadoop?

569

What is purpose of RecordWriter in Hadoop?

546

What are the most common OutputFormat in Hadoop?

583

What is LazyOutputFormat in Hadoop?

539

What is Identity reducer?

570

What is Chain Mapper?

605

What are the core methods of a Reducer?

555

What are the parameters of mappers and reducers?

532

What is the difference between TextinputFormat and KeyValueTextInputFormat class?

546

How is the splitting of file invoked in Hadoop ?

575

How many InputSplits will be made by hadoop framework?

528

Explain the usage of Context Object?

521


Un-Answered Questions { Hadoop }

What is the work of Export in Hadoop sqoop?

5


Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

656


Explain Drop View Statement along with syntax?

5


Virtual Box & Ubuntu Installation?

1048


When a large data set is maintained?

778


Does hadoop always require digital data to process?

1216


Explain the differences between a combiner and reducer

727


Why Hadoop performs replication, although it results in data redundancy?

1319


Explain how can you minimize data transfers when working with spark?

450


What should be the HDFS Block size to get maximum performance from Hadoop cluster?

41


How can I install Cloudera VM in my system?

1015


Is Apache Spark a good fit for Reinforcement learning?

310


What is Fault Tolerance in HDFS?

59


What is the difference between Hbase and Hive?

761


Name the components of spark ecosystem.

288