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

Can you explain about the cluster manager of apache spark?

275

If map reduce is inferior to spark then is there any benefit of learning it?

298

How can we create rdds in apache spark?

323

What are accumulators in spark?

326

Can you mention some features of spark?

337

What do you understand by the partitions in spark?

333

What is a hive on spark?

313

Mention what is the hadoop mapreduce apis contract for a key and value class?

728

Explain what combiners are and when you should use a combiner in a mapreduce job?

657

What is the function of mapreduce partitioner?

685

What combiners are and when you should use a combiner in a mapreduce job?

653

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

696

Explain what does the conf.setmapper class do?

662

Explain what are the basic parameters of a mapper?

861

Mention what is the next step after mapper or maptask?

690

Un-Answered Questions { Hadoop }

what is gossip protocol?

What is paired rdd in spark?

360

What is prepare() method in Cassandra?

What is difference between spark and mapreduce?

291

How rdd can be created in spark?

273

Explain the Job OutputFormat?

993

Name types of Cluster Managers in Spark.

327

What is the benifit of Distributed cache, why can we just have the file in HDFS and have the application read it?

How spark is faster than hadoop?

280

Who invented spark?

418

What is a namenode?

429

What are the types of Apache Spark transformation?

304

What port does spark use?

330

List the benefits of using Cassandra.

Compare HBase vs RDBMS?

163

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