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Hadoop Interview Questions and Answers

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Frequently asked Hadoop Interview Questions and answers with examples. Tips and Tricks for cracking Hadoop job interview- – PowerPoint PPT presentation

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Updated: 14 March 2017
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Title: Hadoop Interview Questions and Answers


1
Top 100 Hadoop Interview Questions and Answers
2017

2
Top Hadoop Developer Interview Questions
  • Top Hadoop Developer Interview Questions and
    Answers based on different components of the
    Hadoop Ecosystem-
  • Hadoop Basic Interview Questions
  • Hadoop HDFS Interview Questions
  • MapReduce Interview Questions
  • Hadoop HBase Interview Questions
  • Hadoop Sqoop Interview Questions
  • Hadoop Flume Interview Questions
  • Hadoop Zookeeper Interview Questions
  • Pig Interview Questions
  • Hive Interview Questions
  • Hadoop YARN Interview Questions

3
Big Data Hadoop Interview Questions and Answers
4
Differentiate between Structured and Unstructured
data
  • Data which can be stored in traditional database
    systems in the form of rows and columns, for
    example the online purchase transactions can be
    referred to as Structured Data. Data which can be
    stored only partially in traditional database
    systems, for example, data in XML records can be
    referred to as semi structured data. Unorganized
    and raw data that cannot be categorized as semi
    structured or structured data is referred to as
    unstructured data. Facebook updates, Tweets on
    Twitter, Reviews, web logs, etc. are all examples
    of unstructured data.
  • For more Big Data Hadoop Interview Questions and
    Answers - https//www.dezyre.com/article/top-100-h
    adoop-interview-questions-and-answers-2017/159

5
Hadoop HDFS Interview Questions and Answers
6
What is commodity hardware?
  • Commodity Hardware refers to inexpensive systems
    that do not have high availability or high
    quality. Commodity Hardware consists of RAM
    because there are specific services that need to
    be executed on RAM. Hadoop can be run on any
    commodity hardware and does not require any super
    computers or high end hardware configuration to
    execute jobs.
  • For more Hadoop HDFS Interview Questions and
    Answers - https//www.dezyre.com/article/top-100-h
    adoop-interview-questions-and-answers-2017/159

7
Hadoop MapReduce Interview Questions and Answers
8
What is the fundamental difference between a
MapReduce Split and a HDFS block?
  • MapReduce split is a logical piece of data fed to
    the mapper. It basically does not contain any
    data but is just a pointer to the data. HDFS
    block is a physical piece of data.
  • For more Hadoop MapReduce Interview Questions and
    Answers -https//www.dezyre.com/article/mapreduce-
    interview-questions-and-answers-for-2017/248

9
Hadoop HBase Interview Questions and Answers
10
What is Row Key?
  • Every row in an HBase table has a unique
    identifier known as Row Key. It is used for
    grouping cells logically and it ensures that all
    cells that have the same RowKeys are co-located
    on the same server. RowKey is internally regarded
    as a byte array.
  • For More Hadoop HBase Interview Questions and
    Answers - https//www.dezyre.com/article/hbase-int
    erview-questions-and-answers-for-2017/281

11
Hadoop Pig Interview Questions and Answers
12
Explain about the BloomMapFile
  • BloomMapFile is a class that extends the MapFile
    class. It is used in HBase table format to
    provide quick membership test for the keys using
    dynamic bloom filters.
  • For More Pig Interview Questions and Answers -
    https//www.dezyre.com/article/pig-interview-quest
    ions-and-answers-for-2017/244

13
Apache Hive Interview Questions and Answers
14
What is the use of Hcatalog?
  • Hcatalog can be used to share data structures
    with external systems. Hcatalog provides access
    to hive metastore to users of other tools on
    Hadoop so that they can read and write data to
    hives data warehouse.
  • For More Hive Interview Questions and Answers-
    https//www.dezyre.com/article/hive-interview-ques
    tions-and-answers-for-2017/246
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