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?

420

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

307

Explain coalesce operation in Apache Spark?

323

Explain the level of parallelism in spark streaming?

289

Explain join() operation in Apache Spark?

354

How to process data using Transformation operation in Spark?

305

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

281

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

313

Explain the operation reduce() in Spark?

287

Explain the lookup() operation in Spark?

231

Explain the processing speed difference between Hadoop and Apache Spark?

291

Explain the operation transformation and action in Apache Spark RDD?

328

Explain Spark join() operation?

286

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

342

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

381

Un-Answered Questions { Big Data }

Suppose hadoop spawned 100 tasks for a job and one of the tasks failed. What will hadoop do?

482

Is spark part of hadoop ecosystem?

293

How NameNode tackle Datanode failures in HDFS?

What are the most memory-intensive operations?

What is the history of apache mahout? Once did it start?

What is a secondary namenode?

628

what does the text input format do?

815

What is Cassandra Query Language?

What is the default value of map and reduce max attempts?

932

What is CTAS Table in Hive?

738

Explain the fundamental difference between Cassandra and Hadoop?

224

What is the use of “void close()” method?

Why are we using Flume?

What are the different collection type in Hive?

705

What is a nosql database?

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