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?

293

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?

372

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

403

Explain Spark coalesce() operation?

306

Un-Answered Questions { Hadoop }

How data or file is written into Hadoop HDFS?

What is the reason of using hbase?

194

Explain the term memtable?

What is a Hive variable? What for we use it?

847

How often do you need to reformat the namenode?

553

How analysis of Big Data is useful for organizations?

526

What is the usage of foreach operation in Pig scripts?

910

Explain what is sqoop in Hadoop ?

775

What are the advantages of using mapreduce with hadoop?

636

Can Ambari manage multiple clusters?

What is bag data type in Pig?

719

How to restart NameNode or all the daemons in Hadoop HDFS?

What problems can be addressed by using Zookeeper?

983

Is it necessary to write a mapreduce job in java?

666

Can we load data into a view?

745

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