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

Big Data Interview Questions

Questions Answers Views Company eMail

What is the need of key-value pair to process the data in MapReduce?

721

What are the main configuration parameters in a MapReduce program?

691

What do you mean by shuffling and sorting in MapReduce?

762

What is Combiner in MapReduce?

700

Where sorting is done in Hadoop MapReduce Job?

692

What are the configuration parameters in the 'MapReduce' program?

725

How many times combiner is called on a mapper node in Hadoop?

703

Explain about the partitioning, shuffle and sort phase in MapReduce?

879

Does Partitioner run in its own JVM or shares with another process?

773

Why MapReduce uses the key-value pair to process the data?

685

What is Distributed Cache in the MapReduce Framework?

674

How to create a custom key and custom value in MapReduce Job?

728

Is reduce-only job possible in Hadoop MapReduce?

748

How to optimize MapReduce Job?

699

In MapReduce how to change the name of the output file from part-r-00000?

677

Un-Answered Questions { Big Data }

Hadoop sqoop is which type of tool?

How can we create znodes?

What are the collection data types provided by CQL?

What is shark?

301

Describe the run-time architecture of Spark?

307

Are Cassandra, Hadoop, Hbase and Cassandra are the same in nature? Specify.

How can you trigger automatic clean-ups in Spark to handle accumulated metadata?

467

Explain what is jobtracker in hadoop? What are the actions followed by hadoop?

459

What is compute and Storage nodes?

1060

Does this lead to security issues?

775

Why do we need rdd in spark?

304

What are the four essential parameters of a mapper?

708

What is the role of the namenode?

506

What is the difference between apache mahout and cloudera oryx ?

What are some of the interesting facts about Big Data?

686

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