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 driver program in spark?

312

What is spark submit?

301

How do I clear my spark cache?

283

What is a partition in spark?

396

What is spark vectorization?

329

What is off heap memory in spark?

326

What is a tuple in spark?

300

Is spark an etl?

304

How is rdd distributed?

335

What are the common transformations in apache spark?

303

What is the difference between dataset and dataframe in spark?

382

What is distributed cache in spark?

364

What is catalyst framework in spark?

322

How is dag created in spark?

303

What does spark do during speculative execution?

344

Un-Answered Questions { Hadoop }

What is the difference between mahout and graphlab ?

What is Hadoop Distributed File System- HDFS?

What does /var/hadoop/pids do?

1322

Does HDFS allow a client to read a file which is already opened for writing?

What are the different functions available in pig latin language?

603

What is Pig Storage?

639

Mention what is the data storage component used by hadoop?

482

Does 'ILLUSTRATE' run a MapReduce job?

565

What is decorating filters?

305

Explain the main difference between kafka and flume?

646

How do you integrate spark and hive?

339

If the source data gets updated every now and then, how will you synchronize the data in hdfs that is imported by sqoop?

162

How can you check all the tables present in a single database using Sqoop?

what are Task Tracker and Job Tracker?

1120

What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?

748

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