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?

241

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

256

How can we create rdds in apache spark?

287

What are accumulators in spark?

289

Can you mention some features of spark?

305

What do you understand by the partitions in spark?

296

What is a hive on spark?

271

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

638

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

572

What is the function of mapreduce partitioner?

588

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

552

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

596

Explain what does the conf.setmapper class do?

571

Explain what are the basic parameters of a mapper?

754

Mention what is the next step after mapper or maptask?

593

Un-Answered Questions { Hadoop }

What are Flume core components?

What are the execution modes in the apache pig?

470

What is stage and task in spark?

202

What are the data components used by Hadoop?

700

What is difference the between sqoop and distcp?

What is data skew and how do you fix it?

311

List out the commands that are used to start, check the progress and stop the ambari server?

What is dag – directed acyclic graph?

276

Is there a date data type in Hive?

702

What do you mean by column family in Cassandra?

If a particular file is 50 mb, will the hdfs block still consume 64 mb as the default size?

Define a metadata?

605

Name three data source available in SparkSQL

284

What is the use of foreach operation in Pig scripts?

545

Can you explain edge nodes in hadoop?

401

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