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

Big Data Interview Questions

Questions Answers Views Company eMail

Explain fullOuterJoin() operation in Apache Spark?

454

How many partitions are created by default in Apache Spark RDD?

319

Explain coalesce operation in Apache Spark?

343

Explain the level of parallelism in spark streaming?

300

Explain join() operation in Apache Spark?

366

How to process data using Transformation operation in Spark?

320

What is Resilient Distributed Dataset (RDD) in Apache Spark? How does it make spark operator rich?

304

What are the differences between Caching and Persistence method in Apache Spark?

323

Explain the operation reduce() in Spark?

310

Explain the lookup() operation in Spark?

246

Explain the processing speed difference between Hadoop and Apache Spark?

306

Explain the operation transformation and action in Apache Spark RDD?

350

Explain Spark join() operation?

300

How is RDD in Apache Spark different from Distributed Storage Management?

354

Explain various Apache Spark ecosystem components. In which scenarios can we use these components?

401

Un-Answered Questions { Big Data }

Which classes are used by the hive to read and write hdfs files?

how is a file of the size 1 GB uncompressed

967

How spark is used in hadoop?

306

What is speculative execution in spark?

348

What is an input reader in reference to mapreduce?

669

What is lazy evaluation and how is it useful?

316

Use of version command in hadoop sqoop?

Mention what is distributed cache in hadoop?

482

What does a 'MapReduce Partitioner' do?

742

What is the functionality of Query Processor in Apache Hive?

810

Differentiate between piglatin and hiveql?

619

How many Mappers run for a MapReduce job?

666

What is the disadvantage of spark sql?

381

What do you understand by the term data storage?

610

What is the role of the kafka producer api.

588

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