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 is the user of sparkContext?

291

How is the processing of streaming data achieved in Apache Spark? Explain.

268

Can you do real-time processing with Spark SQL?

300

Discuss the role of Spark driver in Spark application?

264

What are the features of RDD, that makes RDD an important abstraction of Spark?

255

What is Apache Spark? What is the reason behind the evolution of this framework?

260

What are accumulators in Apache Spark?

300

What is the reason behind Transformation being a lazy operation in Apache Spark RDD? How is it useful?

464

Explain about the different types of trformations on dstreams?

279

Describe the run-time architecture of Spark?

267

What is the FlatMap Transformation in Apache Spark RDD?

271

can you run Apache Spark On Apache Mesos?

296

Describe Partition and Partitioner in Apache Spark?

280

Describe Accumulator in detail in Apache Spark?

299

List down the languages supported by Apache Spark?

274

Un-Answered Questions { Hadoop }

What type of data hadoop can handle ?

381

What are the disadvantages of using Apache Spark over Hadoop MapReduce?

440

Explain future growth of Apache Ambari?

Hbase blocksize is configured on which level?

164

Mention what happens if the preferred replica is not in the ISR?

516

Does HDFS allow a client to read a file which is already opened for writing?

What are the disservices of utilizing Apache Spark over Hadoop MapReduce?

580

What is a Speculative Execution in Hadoop MapReduce?

616

What is the difference between dataset and dataframe in spark?

344

If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

421

What is a bloom filter?

156

What are the parameters used to create keyspace in cassandra?

Explain about the partitioning, shuffle and sort phase

628

How many maximum jvm can run on a slave node?

636

Types of Data Flow in Flume?

106

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