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?

301

What does rdd mean?

290

How does groupbykey work in spark?

275

What is tungsten in spark?

379

What is the difference between dataframe and dataset in spark?

267

What is an accumulator in spark?

273

What is apache spark used for?

278

What is the difference between spark and scala?

333

What is accumulators and broadcast variables in spark?

310

Does spark run hadoop?

279

What is coalesce in spark sql?

287

What are the features of spark rdd?

275

What is cluster mode in spark?

297

What are shared variables in spark?

275

What is the future of apache spark?

263

Un-Answered Questions { Hadoop }

Explain what is the role of the zookeeper?

463

Why is block size large in Hadoop?

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

665

How do I start a spark cluster?

279

How do you stop a running job gracefully?

563

What is the Data model, and the hierarchical namespace?

What is a "Parquet" in Spark?

293

When should you use hbase?

178

After increasing the replication level, I still see that data is under replicated. What could be wrong?

422

What happens if number of reducers are 0?

435

What is the difference between a Hadoop and Relational Database and Nosql?

1023

What is spark mapvalues?

263

What are the collection data types provided by CQL?

How to resolve small file problem in hdfs?

922

What is the role of Connector API?

499

For More Un-Answered { Hadoop } Questions Click Here