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 problem with the small file in Hadoop?

651

How many Reducers run for a MapReduce job?

695

How to specify more than one directory as input to the MapReduce Job?

699

How to set the number of mappers to be created in MapReduce?

640

What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?

851

What is Reducer in MapReduce?

736

How many Reducers run for a MapReduce job in Hadoop?

590

What is MapReduce in Hadoop?

644

Why Hadoop MapReduce?

670

Why can aggregation not be done in Mapper in MapReduce?

614

How to submit extra files(jars, static files) for MapReduce job during runtime?

677

How many numbers of reducers run in Map-Reduce Job?

610

What is MapReduce? What are the syntax you use to run a MapReduce program?

670

Explain slot in Hadoop Map-Reduce v1?

689

What happen if the number of the reducer is 0 in MapReduce?

652

Un-Answered Questions { Big Data }

What do you mean by the NameNode High Availability in hadoop?

495

What is sparksession and sparkcontext?

273

What are the features of apache mahout?

How is HCatalog different from Hive?

688

When executing Hive queries in different directories, why is metastore_db created in all places from where Hive is launched?

839

What combiners are and when you should utilize a combiner in a map reduce job?

608

Wherever (Different Directory) I run the hive query, it creates new metastore_db, please explain the reason for it?

748

What is pyarrow?

415

How does apache spark work?

300

Name the operating system(s) which are supported for production hadoop deployment?

437

What do we mean by Partitions or slices?

281

What are the drawbacks of Pig?

606

What is HDFS - Hadoop Distributed File System?

966

What is PageRank in Spark?

272

How tasks are created in spark?

292

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