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

Big Data Interview Questions

Questions Answers Views Company eMail

Which Sorting algorithm is used in Hadoop MapReduce?

605

What is the need of MapReduce?

633

How to configure the number of the Combiner in MapReduce?

626

How to change a number of mappers running on a slave in MapReduce?

791

Is it mandatory to set input and output type/format in MapReduce?

738

How to set the number of mappers for a MapReduce job?

691

Define Writable data types in Hadoop MapReduce?

645

What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?

704

What is shuffling and sorting in Hadoop MapReduce?

631

Define the Use of MapReduce?

673

Whether the output of mapper or output of partitioner written on local disk?

672

How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?

707

Explain the process of spilling in MapReduce?

600

List Hadoop’s three configuration files?

422

What is Distributed Cache in Hadoop?

461

Un-Answered Questions { Big Data }

How do big data solutions interact with the existing enterprise infrastructure?

479

What do you mean by meta data in hdfs? List the files associated with metadata.

Compare Transformation and Action in Apache Spark?

284

What are the advantages and Disadvantages in archieving partition in Hive?

749

How many Daemon processes run on a Hadoop system?

1105

Suppose that your data is stored in collections, for instance, some binary data, message data or metadata is all keyed on the same value. Will you use HBase for this?

158

explain the use of blinkdb?

289

Explain task granularity

657

Give some advantages of Cassandra?

Explain the use of .mecia class?

785

How to restart Namenode?

750

List out the commands that are used to start, check the progress and stop the ambari server?

Who are ‘Data Scientists’?

422

what is next step after mapper or maptask?

431

What is the primary purpose of sqoop in the hadoop architecture?

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