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 executor memory in a spark application?

332

Explain caching in spark streaming.

329

Do you need to install spark on all nodes of yarn cluster?

2053

Define actions in spark.

2257

How do we create rdds in spark?

575

How is streaming implemented in spark?

1871

Explain a scenario where you will be using spark streaming.

1467

What are the languages supported by apache spark and which is the most popular one?

1725

Is there any benefit of learning mapreduce if spark is better than mapreduce?

1820

How can apache spark be used alongside hadoop?

1821

Define partitions in apache spark.

2194

Is there an api for implementing graphs in spark?

2046

Explain accumulators in apache spark.

2095

What file systems does spark support?

1802

What is a dstream in apache spark?

2049

Un-Answered Questions { Hadoop }

How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?

768

What is cages?

What is JobTracker?

479

What happens in text format?

486

Mention what job does the conf class do?

465

What is the usage of foreach operation in Pig scripts?

911

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

651

How Hadoop is cost-effective?

450

What are the different pig data types?

786

What is Cassandra Data Model?

Is spark written in scala?

310

What is data replication in Cassandra?

How do you stop a spark?

303

How do users interact with the shell in apache pig?

574

What are the benefits of setting up a local repository?

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