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?

422

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

307

Explain coalesce operation in Apache Spark?

329

Explain the level of parallelism in spark streaming?

293

Explain join() operation in Apache Spark?

354

How to process data using Transformation operation in Spark?

307

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

285

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

315

Explain the operation reduce() in Spark?

288

Explain the lookup() operation in Spark?

237

Explain the processing speed difference between Hadoop and Apache Spark?

296

Explain the operation transformation and action in Apache Spark RDD?

330

Explain Spark join() operation?

288

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

346

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

385

Un-Answered Questions { Big Data }

How can you schedule a sqoop job using Oozie?

How to come out of the insert mode?

796

Is there any difference between HBase datamodel and RDBMS datamodel?

1089

Does if offer scaling?

Data Engineer Given a list of followers in the format:123, 345234, 678345, 123â€¦Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?

756

What is the difference between reducebykey and groupbykey?

297

What is sparkContext?

288

What is column store db? Explain with an example.

What is Rack Awareness? What is its need in Hadoop?

540

What are the challenges Of Distributed Applications?

Can you explain logistic regression?

421

What do you know about Partition in Kafka?

664

What do you mean by taskinstance?

755

How much memory is required?

Is databricks a database?

319

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