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 Partitions?

333

Define "Transformations" in Spark

353

What file systems Spark support?

367

Explain key features of Spark

323

What is a "Parquet" in Spark?

338

What is Spark?

291

What is a "worker node"?

354

What do you understand by worker node?

294

What are the functions of "Spark Core"?

309

Why Spark?

300

Compare MapReduce and Spark?

310

Can MapReduce program be written in any language other than Java?

974

How to set which framework would be used to run mapreduce program?

754

List out Hadoop's three configuration files?

667

Mention Hadoop core components?

724

Un-Answered Questions { Hadoop }

What are the components of Hive architecture?

1157

What can be optimum value for Reducer?

1005

What are the benefits of NoSQL over relational database?

223

What is the difference between TextinputFormat and KeyValueTextInputFormat class?

546

What does rack awareness mean?

456

What is NoSQL database?

104

What are the benefits yarn brings in to hadoop?

467

Wherever (Different Directory) I run the hive query, it creates new metastore_db, please explain the reason for it?

781

What are the advantages of DataFrame?

322

What do you mean by inputformat?

658

Give the differences between the different types of primary keys in cassandra?

What is interactive mode in apache pig?

585

What is paired rdd in spark?

362

What are tools available to send the streaming data to hdfs?

Explain the various Transformation on Apache Spark RDD like distinct(), union(), intersection(), and subtract()?

314

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