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?

310

Describe Spark SQL?

358

Explain SparkContext in Apache Spark?

344

What are the types of Transformation in Spark RDD Operations?

292

Explain first() operation in Apache Spark RDD?

402

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

368

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

310

Is it possible to run Apache Spark without Hadoop?

293

What is Apache Spark Streaming?

345

How can you implement machine learning in Spark?

295

List some commonly used Machine Learning Algorithm Apache Spark?

299

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

329

List out the ways of creating RDD in Apache Spark?

299

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

323

What is flatmap in apache spark?

340

Un-Answered Questions { Hadoop }

What is the full form of MSLAB?

227

What are features of apache spark?

350

How can Flume be used with HBase?

119

What is the difference between reducebykey and groupbykey?

308

Replication causes data redundancy then why is is pursued in HDFS?

Why is BlinkDB used?

311

How can you stop a partition form being queried?

800

What are components of Cassandra Data Model?

Does Flume provide 100% reliability to the data flow?

137

Explain what is “map” and what is "reducer" in hadoop?

695

What happens if the block on Hadoop HDFS is corrupted?

How tables are managed in apache tajo?

Describe Replication Factor?

Explain Avro Schemas?

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

301

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