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 keys() operation in Apache spark?

350

What are the roles and responsibilities of worker nodes in the Apache Spark cluster? Is Worker Node in Spark is same as Slave Node?

365

Explain sum(), max(), min() operation in Apache Spark?

315

Explain cogroup() operation in Spark?

299

What is Map() operation in Apache Spark?

383

Explain Spark saveAsTextFile() operation?

363

Define paired RDD in Apache Spark?

293

Explain different transformations in DStream in Apache Spark Streaming?

343

Explain pipe() operation in Apache Spark?

324

What are the ways to create RDDs in Apache Spark? Explain.

328

Explain Spark Core?

325

Explain the flatMap operation on Apache Spark RDD?

334

Can we run Apache Spark without Hadoop?

329

What is DStream in Apache Spark Streaming?

330

Define Partition and Partitioner in Apache Spark?

318

Un-Answered Questions { Hadoop }

What is Implicit Type conversion in Hive?

841

Do you know the comparative differences between apache spark and hadoop?

284

Define the level of parallelism and its need in spark streaming?

404

What is the role of the zookeeper?

Map reduce jobs take too long. What can be done to improve the performance of the cluster?

748

What is avro format?

Whether Pig Latin language is case-sensitive or not?

717

What ports does Cassandra use?

Does Pig give any warning when there is a type mismatch or missing field?

942

What is log compaction?

575

How many datanodes can run on a single Hadoop cluster?

482

what are the values stored in the cassandra column?

What is Importance of Java in Apache Kafka?

585

What is the need of MapReduce in Hadoop?

681

Is there any benefit of learning mapreduce if spark is better than mapreduce?

1820

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