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

Discuss the various running mode of Apache Spark?

291

Describe Spark SQL?

342

Explain SparkContext in Apache Spark?

331

What are the types of Transformation in Spark RDD Operations?

288

Explain first() operation in Apache Spark RDD?

369

What are the ways in which Apache Spark handles accumulated Metadata?

354

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

300

Is it possible to run Apache Spark without Hadoop?

278

What is Apache Spark Streaming?

330

How can you implement machine learning in Spark?

279

List some commonly used Machine Learning Algorithm Apache Spark?

292

What is the command to start and stop the Spark in an interactive shell?

315

List out the ways of creating RDD in Apache Spark?

289

What are the various advantages of DataFrame over RDD in Apache Spark?

309

What is flatmap in apache spark?

327

Un-Answered Questions { Hadoop }

What is compaction in hbase?

171

A number of combiners can be changed or not in MapReduce?

654

How data or file is read in HDFS?

How is indexing done in Hadoop HDFS?

What is the purpose of button groups?

763

What is a yaml file in cassandra?

What are the various components in kafka.

575

What is purpose of RecordWriter in Hadoop?

509

Explain Spark map() transformation?

358

Which code is used to open a connection in hbase?

265

Why is Apache Spark faster than Apache Hadoop?

846

Who invented the first spark plug?

236

What is spark application?

363

What is a partitioning key?

570

What is the role zookeeper plays in a cluster of kafka?

498

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