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 are the identity mapper and reducer in MapReduce?

793

How to optimize Hadoop MapReduce Job?

647

How to specify more than one directory as input in the Hadoop MapReduce Program?

726

How to change the name of the output file from part-r-00000 in Hadoop MapReduce?

659

Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

621

In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

652

How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

636

What is the relation between MapReduce and Hive?

658

What are advantages of Spark over MapReduce?

712

What is the use of InputFormat in MapReduce process?

667

What is Counter in MapReduce?

686

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

759

How to compress mapper output in Hadoop?

688

Why is Apache Spark faster than Hadoop MapReduce?

664

Define MapReduce?

699

Un-Answered Questions { Big Data }

What does it indicate if replica stays out of ISR for a long time?

717

Explain Zookeeper Queues?

Why apache kafka?

613

Some of the most notable applications of Kafka?

521

Define the purpose of the partition function in mapreduce framework

676

How will you calculate the number of executors required to do real-time processing using Apache Spark? What factors need to be considered for deciding on the number of nodes for real-time processing?

291

What is the difference between structured and unstructured big data?

535

What is the difference between Column and SuperColumn?

150

Use of import command in hadoop sqoop?

What are secondary indexes?

Which command is used to run hbase shell?

174

Do we require two servers for the namenode and the datanodes?

533

What is difference between regular file system and HDFS?

1063

What is the latest version of Ambari that is available in the market?

What is the difference between big data and cloud computing?

737

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