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

Define Partition in Apache Spark?

314

How many types of Transformation are there?

314

How you can remove the element with a critical present in any other Rdd is Apache spark?

300

What is Sparse Vector?

341

Is it possible to run Spark and Mesos along with Hadoop?

275

What is DataFrames?

372

Discuss writeahead logging in Apache Spark Streaming?

327

How can data transfer be minimized when working with Apache Spark?

297

What do you mean by Speculative execution in Apache Spark?

306

Explain about the different cluster managers in Apache Spark

334

Explain Spark Executor

282

Explain the level of parallelism in Spark Streaming? Also, describe its need.

329

What are the various storages from which Spark can read data?

340

What is a Sparse Vector?

332

What is the difference between Caching and Persistence in Apache Spark?

323

Un-Answered Questions { Hadoop }

What is the default maximum dynamic partition that can be created by a mapper reducer? How can you change it?

729

Clarify about the smb join in hive?

665

How to create custom key and custom value in MapReduce Job?

611

Can hadoop handle streaming data?

467

Why do we need Pig?

830

What are 'slaves' and 'masters' in Hadoop?

433

Explain small file problem in hadoop

428

Explain briefly what is Action in Apache Spark? How is final result generated using an action?

313

What are active and passive "NameNodes"?

1476

What are the four basic parameters of a reducer?

666

What is ganglia is used for in ambari?

how Cassandra delete Data?

114

Explain the difference between Spark SQL and Hive.

392

What are some typical functions of Job Tracker?

433

Is spark built on top of hadoop?

318

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