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?

668

What are the main configuration parameters in a MapReduce program?

642

What do you mean by shuffling and sorting in MapReduce?

702

What is Combiner in MapReduce?

646

Where sorting is done in Hadoop MapReduce Job?

651

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

676

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

643

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

822

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

707

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

639

What is Distributed Cache in the MapReduce Framework?

633

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

679

Is reduce-only job possible in Hadoop MapReduce?

698

How to optimize MapReduce Job?

657

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

629

Un-Answered Questions { Big Data }

In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

645

Is impala intended to handle real time queries in low-latency applications or is it for ad hoc queries for the purpose of data exploration?

What is CTAS Table in Hive?

747

What is document store db? Explain with an example.

What is the use of “ResultSet execute(Statement statement)” method?

HCatalog helps to Integrate Hadoop with everything. Explain?

Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?

663

What happens to a NameNode that has no data?

1588

What are the window functions provided by apache tajo?

Please explain the sparse vector in Spark.

284

What is the use of get() method?

153

What are the Applications of Apache Pig?

571

What are basic steps to be performed while working with big data?

569

Name job control options specified by mapreduce.

711

Explain sum(), max(), min() operation in Apache Spark?

303

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