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

Explain what is shuffling in mapreduce?

668

Explain what is distributed cache in mapreduce framework?

669

Mention what are the main configuration parameters that user need to specify to run mapreduce job?

779

Explain what is the function of mapreduce partitioner?

676

Explain what is heartbeat in hdfs?

Explain what is a difference between an input split and hdfs block?

Explain how indexing in hdfs is done?

Mention what is the best way to copy files between hdfs clusters?

Mention what is the difference between hdfs and nas?

What is a difference between an input split and hdfs block?

Mention what is the data storage component used by hadoop?

482

Mention what does the text input format do?

450

Mention what daemons run on a master node and slave nodes?

509

Explain what is namenode in hadoop?

474

Explain what is a sequence file in hadoop?

513

Un-Answered Questions { Hadoop }

Explain the different logging levels in cassandra.

What file systems does spark support?

1802

Name three data source available in SparkSQL

319

What are the operational commands of HBase?

198

In a given spark program, how will you identify whether a given operation is Transformation or Action ?

361

What will you do when NameNode is down?

1054

How do I get apache spark on windows 10?

309

Mention what is the use of Context Object?

749

What is the default database provided by Apache Hive for metastore?

676

What do you mean by Thrift in Cassandra?

What is difference between spark and mapreduce?

293

Explain the concept of Leader and Follower?

647

What are the design goals of zookeeper?

how would you modify that solution to only count the number of unique words in all the documents?

1008

Explain how indexing in hdfs is done?

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