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

Explain Spark Driver?

353

Is there any API available for implementing graphs in Spark?

322

Please enumerate the various components of the Spark Ecosystem.

412

What is the role of Spark Driver in spark applications?

336

Name three companies which is used Spark Streaming services

340

Explain the default level of parallelism in Apache Spark

328

Explain the process to trigger automatic clean-up in Spark to manage accumulated metadata.

325

Can You Use Apache Spark To Analyze and Access Data Stored In Cassandra Databases?

314

What is Spark SQL?

325

Can you explain how to minimize data transfers while working with Spark?

550

What are the ways to launch Apache Spark over YARN?

298

is it necessary to install Spark on all nodes while running Spark application on Yarn?

331

What is a worker node in Apache Spark?

310

What is worker node in Apache Spark cluster?

314

What is action, how it process data in apache spark

353

Un-Answered Questions { Hadoop }

List out the difference between textFile and wholeTextFile in Apache Spark?

420

What are the different Data Types available in Hive?

752

Explain what do you understand by cassandra- cql collections?

Explain jsonloader, jsonstorage functions in pig?

631

Why slaves limited to 4000 in hadoop version 1?

539

Do we need to install spark in all nodes?

285

What do you mean by Schema Declaration?

What is the process to change the files at arbitrary locations in HDFS?

1452

how indexing in HDFS is done?

901

How does gossip protocol work?

What is a namenode in hadoop?

Is there an api for implementing graphs in spark?

2048

Do I need scala for spark?

314

Explain how cassandra writes changed data into commitlog?

Discuss writeahead logging in Apache Spark Streaming?

344

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