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

Explain parquet file?

282

What is lazy evaluation and how is it useful?

306

How is transformation on rdd different from action?

344

What is a dataset? What are its advantages over dataframe and rdd?

297

What is pagerank?

286

What is dag – directed acyclic graph?

303

Explain schemardd?

359

Describe coalesce() operation. When can you coalesce to a larger number of partitions? Explain.

331

When we create an rdd, does it bring the data and load it into the memory?

345

What does reduce action do?

282

how can you identify whether a given operation is transformation or action?

273

Explain the use of broadcast variables

319

How do you parse data in xml? Which kind of class do you use with java to pass data?

307

Explain sortbykey() operation?

292

List various commonly used machine learning algorithm?

373

Un-Answered Questions { Hadoop }

What are the different tools used for the ambari monitoring purpose?

How do I check my spark status?

276

What is difference between Column and Super Column?

What are the features of Standalone (local) mode?

598

What are the different database elements of cassandra?

What is JPS? Why is it used in Hadoop?

532

What is output format in hadoop?

690

Why HDFS?

List of some best tools that can be useful for data-analysis?

432

Explain plucktuple?

582

Explain a scenario where you will be using spark streaming.

1458

What is map in spark?

333

Does Pig differ from MapReduce? If yes, how?

597

Bag in pig ?

580

What are the key segments of hive architecture?

675

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