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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What is the user of sparkContext?

313

How is the processing of streaming data achieved in Apache Spark? Explain.

286

Can you do real-time processing with Spark SQL?

318

Discuss the role of Spark driver in Spark application?

288

What are the features of RDD, that makes RDD an important abstraction of Spark?

280

What is Apache Spark? What is the reason behind the evolution of this framework?

281

What are accumulators in Apache Spark?

318

What is the reason behind Transformation being a lazy operation in Apache Spark RDD? How is it useful?

482

Explain about the different types of trformations on dstreams?

302

Describe the run-time architecture of Spark?

282

What is the FlatMap Transformation in Apache Spark RDD?

293

can you run Apache Spark On Apache Mesos?

311

Describe Partition and Partitioner in Apache Spark?

303

Describe Accumulator in detail in Apache Spark?

314

List down the languages supported by Apache Spark?

293

Un-Answered Questions { Hadoop }

What do we mean by Paraquet?

446

Rack awareness of Namenode?

854

Describe REVERSE function in Hive with example?

706

Discuss writeahead logging in Apache Spark Streaming?

326

Tell something about the query language used in Cassandra Database?

What are best features of Apache Avro?

Mention what does the shell commands “capture” and “consistency” determines?

What is tungsten engine in spark?

318

How do I get apache spark on windows 10?

296

What is kafka Producer?

529

What does rdd stand for in logistics?

315

What is a UDF in Pig?

740

When should you use hbase?

183

How to set mappers and reducers for Hadoop jobs?

613

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

313

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