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 combiners are and when you should use a combiner in a mapreduce job?

661

Explain what is “map” and what is "reducer" in hadoop?

707

Explain what does the conf.setmapper class do?

672

Explain what are the basic parameters of a mapper?

869

Mention what is the next step after mapper or maptask?

700

Explain what is shuffling in mapreduce?

677

Explain what is distributed cache in mapreduce framework?

677

Mention what are the main configuration parameters that user need to specify to run mapreduce job?

787

Explain what is the function of mapreduce partitioner?

688

Explain what is heartbeat in hdfs?

Explain what is a difference between an input split and hdfs block?

Explain how indexing in hdfs is done?

Mention what is the best way to copy files between hdfs clusters?

Mention what is the difference between hdfs and nas?

What is a difference between an input split and hdfs block?

Un-Answered Questions { Big Data }

Differentiate between drop and truncate in cqlsh

How to identify that given operation is transformation/action in your program?

303

What is partitioner and its usage?

755

Why do fires spark?

316

Can you give some examples of Big Data?

528

What Is Difference Between Mapreduce and Pig ?

677

What do you understand from Node redundancy and is it exist in hadoop cluster?

1277

Mention some use cases of apache mahout?

What are the advantages of datasets in spark?

296

Explain totuple function?

631

Ideally what should be replication factor in a Hadoop cluster?

561

What are the destination types allowed in sqoop import command?

By Default, how many partitions are created in RDD in Apache Spark?

325

Mention Hadoop core components?

727

What are the key elements in ZooKeeper Architecture?

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