Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

In MapReduce Data Flow, when Combiner is called?

655

Differentiate Reducer and Combiner in Hadoop MapReduce?

684

What is the key- value pair in MapReduce?

789

A number of combiners can be changed or not in MapReduce?

654

How to write a custom partitioner for a Hadoop MapReduce job?

655

What is the need of MapReduce in Hadoop?

632

What does a 'MapReduce Partitioner' do?

689

What is the difference between Reducer and Combiner in Hadoop MapReduce?

681

What is Data Locality in Hadoop?

672

What is KeyValueTextInputFormat in Hadoop MapReduce?

811

What is Mapper in Hadoop MapReduce?

741

How to set mappers and reducers for MapReduce jobs?

635

How to sort intermediate output based on values in MapReduce?

660

Can we set the number of reducers to zero in MapReduce?

703

Where sorting is done on mapper node or reducer node in MapReduce?

683

Un-Answered Questions { Big Data }

Name different elements of JConsole?

What is the command to start and stop the Spark in an interactive shell?

315

Does spark use hive?

267

What is Purpose to Validate in Sqoop?

Explain what you understand by speculative execution

613

Name Applications and Use Cases of HCatalog?

Is it possible to provide multiple input to Hadoop? If yes then how?

502

Have you ever used counters in hadoop?

422

What do you mean by metadata in HDFS?

Give me the examples of Columnar database ?

587

What is a spark rdd?

315

What is hadoop spark?

303

What is the sequencefileinputformat in hadoop?

723

What is the significance of cluster class in Cassandra?

Input Split & Record Reader and what they do?

1037

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