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

Big Data Interview Questions

Questions Answers Views Company eMail

Where is the output of Mapper written in Hadoop?

771

Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?

676

Explain the difference between a MapReduce InputSplit and HDFS block?

656

How to create custom key and custom value in MapReduce Job?

601

How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

603

What is the difference between Job and Task in MapReduce?

613

Compare Pig vs Hive vs Hadoop MapReduce?

674

What is the fundamental difference between a MapReduce InputSplit and HDFS block?

619

How to submit extra files(jars, static files) for Hadoop MapReduce job during runtime?

634

How to get the single file as the output from MapReduce Job?

626

Why is output file name in Hadoop MapReduce part-r-00000?

626

Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?

599

Explain the process of spilling in Hadoop MapReduce?

631

What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?

599

What are the the issues associated with the map and reduce slots based mechanism in mapReduce?

644

Un-Answered Questions { Big Data }

Explain Creating an Index?

Explain the term Cluster?

105

What are the restriction to the key and value class ?

431

Explain the various table design approaches in HBase?

138

Explain Cqlsh?

When is it suggested to use a combiner in a MapReduce job?

635

What are the key features of Apache Spark that you like?

388

How does hdfs ensure information integrity of data blocks squares kept in hdfs?

I want to see the present working directory in UNIX from hive. Is it possible to run this command from hive?

664

What are the modules that constitute the Apache Hadoop 2.0 framework?

1005

What is the purpose of retention period in Kafka cluster?

660

Explain what is storage and compute nodes?

512

Elaborate on cassandra - cql?

What should be the HDFS Block size to get maximum performance from Hadoop cluster?

What is a parquet file?

284

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