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?

588

Explain what is distributed cache in mapreduce framework?

591

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

699

Explain what is the function of mapreduce partitioner?

610

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?

415

Mention what does the text input format do?

390

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

449

Explain what is namenode in hadoop?

409

Explain what is a sequence file in hadoop?

432

Un-Answered Questions { Hadoop }

What is a rack awareness algorithm?

Which code do we use to open the connection in Hbase?

184

Explain the process for starting a kafka server?

493

Which is the best spark certification?

279

What are the three layers where the hadoop components are actually supported by ambari?

What is shuffle read and shuffle write in spark?

301

What is Output Format in MapReduce?

664

How HCatalog helps to capture processing states to enable sharing?

Which is better hadoop or spark?

278

What are benefits of Spark over MapReduce?

444

How to copy file from HDFS to local?

Is apache spark an etl tool?

259

What is Hive query processor?

870

Which are the elements of kafka?

576

What is Fault Tolerance in HDFS?

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