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?

780

How to optimize Hadoop MapReduce Job?

631

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

713

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

650

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

613

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

644

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

624

What is the relation between MapReduce and Hive?

640

What are advantages of Spark over MapReduce?

690

What is the use of InputFormat in MapReduce process?

650

What is Counter in MapReduce?

675

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

751

How to compress mapper output in Hadoop?

674

Why is Apache Spark faster than Hadoop MapReduce?

655

Define MapReduce?

688

Un-Answered Questions { Big Data }

Define "Action" in Spark

286

Do we need to install scala for spark?

311

Where can the metastore database be hosted?

What do you understand by mem-table in cassandra?

Define primary key in Apache Cassandra?

What is the relationship between hdfs, hbase, pig, hive and azkaban?

510

What are the most common InputFormats in Hadoop?

591

What is sink processors?

What are the main classes of Data Transfer API?

What is the default replication factor in Hadoop and how will you change it?

590

What is rdd partition?

316

How can you prevent a large job from running for a long time? What do u think is more popular among the developers - Pig or Hive?

662

What is the role of the ZooKeeper in Kafka?

526

What are the views in Hive?

665

What is the biggest shortcoming of Spark?

315

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