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 Starvation scenario in spark streaming?

358

Explain the action count() in Spark RDD?

287

Define the run-time architecture of Spark?

295

What are the languages in which Apache Spark create API?

312

What are the features and characteristics of Apache Spark?

309

Explain Spark streaming?

288

Explain first() operation in Spark?

366

Define fold() operation in Apache Spark?

319

Explain reduceByKey() Spark operation?

315

Explain Spark Streaming with Socket?

345

Explain Spark SQL caching and uncaching?

346

What are the different input sources for Spark Streaming?

389

How do we represent data in Spark?

374

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

403

Explain Spark coalesce() operation?

306

Un-Answered Questions { Hadoop }

What are the different elements of jconsole?

What is the standalone mode in spark cluster?

283

Say when to pick “inward table” and “outside table” in hive?

754

What is Hive query processor?

956

What is bloom filter?

What is a column family in Cassandra?

What does rdd mean?

333

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

Does spark use hive?

288

Does cassandra support acid tractions?

On what basis name node distribute blocks across the data nodes in HDFS?

What is the use of binstorage?

599

Use of eval command in hadoop sqoop?

What is Starvation scenario in spark streaming?

358

How will format the HDFS ?

1122

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