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 jobtracker?

634

What is the jobtracker and what it performs in a hadoop cluster?

637

How many instances of tasktracker run on a hadoop cluster?

680

Explain the use of tasktracker in the hadoop cluster?

634

How does a namenode handle the failure of the data nodes?

691

How is spark sql different from hql and sql?

273

Is there a module to implement sql in spark? How does it work?

300

What is pagerank in graphx?

284

How is streaming implemented in spark? Explain with examples.

357

Can you use spark to access and analyze data stored in cassandra databases?

307

What are the languages supported by apache spark?

286

Name the components of spark ecosystem.

276

What operations does rdd support?

278

Is there a module to implement sql in spark?

282

How is machine learning implemented in spark?

324

Un-Answered Questions { Hadoop }

What are the most commonly defined input formats in Hadoop?

1060

Does spark load all data in memory?

340

What are the abstractions of Apache Spark?

307

What is key-value store db? Explain with an example.

What is map side join?

306

List out the different stream grouping in apache storm?

383

What are the main components in Hadoop Eco-System and what are their functions ?

495

Explain the core benefits for hadoop users by using the apache ambari?

Explain pigdump function?

615

Explain what happens in textinformat ?

750

If there is certain data that we want to use again and again in different transformations, what should improve the performance?

304

How can we create rdds in apache spark?

313

What is the difference between hadoop and spark?

273

Explain leftOuterJoin() and rightOuterJoin() operation in Apache Spark?

393

how will you implement SQL in Spark?

378

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