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

Define Actions.

303

Illustrate some demerits of using Spark.

315

Define "Action" in Spark

289

List the benefits of Spark over MapReduce.

294

What is the biggest shortcoming of Spark?

319

What is a "Spark Executor"?

353

Explain the key features of Spark.

286

What is Spark Driver?

308

What do you understand by Transformations in Spark?

318

How does one create RDDs in Spark?

278

What is an "Accumulator"?

283

Compare Spark vs Hadoop MapReduce

330

What operations does the "RDD" support?

299

What is a "Spark Driver"?

341

Define functions of SparkCore?

502

Un-Answered Questions { Hadoop }

How often do you need to reformat the namenode?

515

What are Actions?

322

What is Mapper in Hadoop?

562

What is the use of Bloom Filter in Cassandra?

125

Describe REVERSE function in Hive with example?

718

Explain fold() operation in spark?

309

Explain Zookeeper Leader election?

Does spark need hadoop?

283

What do you understand by logging in cassandra?

How does fault tolerance work in mapreduce?

631

Clarify about the smb join in hive?

660

What does hdfs mean?

What is the difference between Pig and SQL?

646

Is hive a nosql database?

647

What is a mapreduce algorithm?

647

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