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 difference between coalesce and repartition in spark?

317

What does rdd mean?

314

How does groupbykey work in spark?

299

What is tungsten in spark?

393

What is the difference between dataframe and dataset in spark?

285

What is an accumulator in spark?

299

What is apache spark used for?

305

What is the difference between spark and scala?

354

What is accumulators and broadcast variables in spark?

328

Does spark run hadoop?

299

What is coalesce in spark sql?

311

What are the features of spark rdd?

286

What is cluster mode in spark?

319

What are shared variables in spark?

304

What is the future of apache spark?

279

Un-Answered Questions { Hadoop }

Who creates dag in spark?

339

Does Apache Spark provide checkpoints?

284

Before deploying the hadoop instance, what are the checks that an individual should do?

Is ambari python clients can be used to make the good use of ambari api’s?

What do slaves consist of?

667

As part of optimizing the queries in hive, what should be the order of table size in a join query?

697

Compare hive, hbase, and impala?

Can you give a detailed overview about the Big Data being generated by Facebook?

432

What is dataframe api?

320

Name some Complex types of Data types, Avro Supports?

How can you minimize data transfers when working with Spark?

349

How does broadcast join work in spark?

304

Name various types of Cluster Managers in Spark.

346

What is shuffleing in mapreduce?

648

What do you mean by the high availability of a namenode? How is it achieved?

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