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?

294

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?

332

What is DStream in Apache Spark Streaming?

331

Define Partition and Partitioner in Apache Spark?

318

Un-Answered Questions { Hadoop }

How can Flume be used with HBase?

119

Is the following approach correct? Is the sqrt Of Sum Of Sq a valid reducer?

487

What are the different Data Types available in Hive?

752

Why do fires spark?

316

Mention the salient features of apache tajo ?

What is replication in kafka?

542

What is the primary purpose of the pig in the hadoop architecture?

2766

What is rdd partition?

334

Define the Use of Pig?

594

What is the use of expand cqlsh command in Cassandra?

How to write 'foreach' statement for tuple datatype in pig scripts?

651

Is there a module to implement sql in spark?

295

Assume that an HBase table Student is disabled. So, how to access the student table once it is disabled, by using Scan command?

171

What is compaction in hbase?

173

What are the benefits of lazy evaluation?

317

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