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?

346

Explain the action count() in Spark RDD?

281

Define the run-time architecture of Spark?

286

What are the languages in which Apache Spark create API?

298

What are the features and characteristics of Apache Spark?

289

Explain Spark streaming?

274

Explain first() operation in Spark?

348

Define fold() operation in Apache Spark?

307

Explain reduceByKey() Spark operation?

302

Explain Spark Streaming with Socket?

323

Explain Spark SQL caching and uncaching?

332

What are the different input sources for Spark Streaming?

375

How do we represent data in Spark?

357

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

393

Explain Spark coalesce() operation?

293

Un-Answered Questions { Hadoop }

What is the difference between rdd and dataframe in spark?

352

What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?

700

Describe the distnct(),union(),intersection() and substract() transformation in Apache Spark RDD?

303

How can you make sure of logical grouping of cells in the hbase?

203

Explain what is jobtracker in hadoop? What are the actions followed by hadoop?

410

What is RDD Lineage?

417

Can there be no Reducer?

842

How to change from su to cloudera?

721

Why does my select statement fail?

Mention what is the maximum size of the message does kafka server can receive?

537

What do sorting and shuffling do?

699

Explain about tajo worker configuration?

When the reducers are are started in a mapreduce job?

599

Do we need scala for spark?

305

What does a split do?

628

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