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?

247

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

264

How can we create rdds in apache spark?

295

What are accumulators in spark?

296

Can you mention some features of spark?

311

What do you understand by the partitions in spark?

301

What is a hive on spark?

275

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

644

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

581

What is the function of mapreduce partitioner?

599

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

566

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

607

Explain what does the conf.setmapper class do?

579

Explain what are the basic parameters of a mapper?

763

Mention what is the next step after mapper or maptask?

600

Un-Answered Questions { Hadoop }

What is NoSQL database?

What is CQLSH in Cassandra?

Clarify how job tracker schedules an assignment?

393

What are the Benefits Of Distributed Applications?

What is the use of ZooKeeper?

224

How can we create rdds in apache spark?

295

What are the relational operators available related to combining and splitting in pig language?

680

Explain Spark join() operation?

266

Is apache spark a database?

304

When should you use cassandra?

Explain Dsstream with reference to Apache Spark

373

Define sparksession in apache spark? Why is it needed?

265

Which directory does hadoop install to?

465

What all tasks you can perform for managing services using Ambari service tab?

Tell any two feature Flume?

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