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

Big Data Interview Questions

Questions Answers Views Company eMail

How to add/delete a Node to the existing cluster?

524

What is Mapper in Hadoop?

555

What is Reducer in Hadoop?

549

What are the most common InputFormats in Hadoop?

591

Explain InputSplit in Hadoop?

460

What is the purpose of RecordReader in hadoop?

482

What is Combiner in Hadoop?

534

If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

451

Why aggregation cannot be done in Mapper?

560

Explain map-only job?

526

What is KeyValueTextInputFormat in Hadoop?

529

What happen if number of reducer is set to 0 in Hadoop?

493

What is TextInputFormat in Hadoop?

517

What is purpose of RecordWriter in Hadoop?

509

What are the most common OutputFormat in Hadoop?

549

Un-Answered Questions { Big Data }

Use of create-hive-table command in hadoop sqoop?

How are sparks created?

291

Big Data Engineer Can you explain what REST is?

What is the significance of ‘IF EXISTS” clause while dropping a table?

715

How do you parse data in xml? Which kind of class do you use with java to pass data?

307

What does repartition do in spark?

328

How to enable recycle bin in hadoop?

766

What is difference between spark and scala?

263

What is hadoop technology?

311

Discuss about the different tombstone markers used for deletion purposes in HBase.?

185

What do you mean by data locality?

673

What is Apache Spark and what are the benefits of Spark over MapReduce?

278

Explain what is webdav in hadoop?

508

What is Immutable?

332

Explain what does the conf.setmapper class do?

611

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