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

When running Spark applications, is it necessary to install Spark on all the nodes of YARN cluster?

324

What is the significance of Sliding Window operation?

308

Why is BlinkDB used?

301

What is the advantage of a Parquet file?

329

What are the key features of Apache Spark that you like?

388

What do you understand by SchemaRDD?

315

How can you achieve high availability in Apache Spark?

433

Define a worker node?

455

Name a few companies that use Apache Spark in production?

325

What is the difference between persist() and cache()?

323

Which spark library allows reliable file sharing at memory speed across different cluster frameworks?

271

What does the Spark Engine do?

323

How Spark uses Akka?

320

How Spark handles monitoring and logging in Standalone mode?

336

What is Hadoop serialization?

Capital One,

697

Un-Answered Questions { Hadoop }

What is structured data?

649

Describe Network Topology Strategy?

132

What is spark context spark session?

283

What does apache mahout do?

In MapReduce, ideally how many mappers should be configured on a slave?

664

Can you explain benefits of spark over mapreduce?

287

What are the main features of hdfssite.xml?

What is the process of creating an Ambari client?

How to save RDD?

313

What is Cassandra-CQL collection?

Explain Tombstone in Cassandra?

What is difference between reducer and combiner?

564

What is Fault Tolerance?

533

Is spark based on hadoop?

312

Why do we need Pig?

823

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