Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

What is Schema on Read and Schema on Write?

916

How to overwrite an existing output file during execution of mapreduce jobs?

MRO,

1091

Write a Pig UDF Example ?

767

What is the difference between traditional RDBMS and Hadoop?

1170

What is the main purpose of HDFS fsck command?

1792

What is safe mode in Hadoop?

960

Detail description of the Reducer phases?

851

What is MapFile?

964

What do you understand from Node redundancy and is it exist in hadoop cluster?

1231

What is HBase?

359

What happens to a NameNode that has no data?

1585

What is a Hive Metastore?

1 2046

How can an application connect to Hive run as a server?

1168

What is a heartbeat in HDFS?

917

What are sink processors?

909

Un-Answered Questions { Big Data }

Which object can be used to get the progress of a particular job

469

What is spark database?

336

Explain how can you minimize data transfers when working with spark?

436

Name the two types of shared variable available in Apache Spark?

301

How does hbase actually delete a row?

192

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

What are the various diagnostic operators available in Apache Pig?

735

Why use hadoop?

434

What is the difference between Pig and SQL?

634

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

303

What is High Availability feature in Hadoop2?

440

What is the core of the job in MapReduce framework?

848

Is hadoop required for data science?

684

What is Hadoop Map Reduce ?

804

What does the Spark Engine do?

323

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