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 are the roles of the file system in any framework?

315

Name some companies that are already using Spark Streaming?

268

What is Spark Streaming?

297

What does it mean by Columnar Storage Format?

303

What is Spark Dataset?

329

Why is there a need for broadcast variables when working with Apache Spark?

308

What is the abstraction of Spark Streaming?

263

What are shared variables?

332

Does Spark provide the storage layer too?

280

What are the advantages of datasets in spark?

278

How to save RDD?

315

What are the common faults of the developer while using Apache Spark?

287

When creating an RDD, what goes on internally?

296

What is Spark MLlib?

410

What is meant by Transformation? Give some examples.

311

Un-Answered Questions { Hadoop }

What are the operational commands of HBase?

188

What do you know about schemardd?

312

how can we change Replication Factor?

1032

what Hive is composed of ?

686

What is RDD in Apache Spark? How are they computed in Spark? what are the various ways in which it can create?

323

What are the side effects of not running a secondary name node?

453

How can we create znodes?

How the read operation is performed on Cassandra node ?

102

List some use cases where classification machine learning algorithms can be used.

472

What do you understand by unit and ()in scala?

503

Can you explain rack awareness?

440

How to create hadoop archive?

425

Explain how cassandra writes data?

In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

646

What does ‘jps’ command do?

703

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