Hadoop HDFS Online Quiz Questions and Answers

1. Objective

This online quiz is based upon Hadoop HDFS (Hadoop Distributed File System). If you are not familiar with Hadoop HDFS so you can refer our HDFS Introduction tutorial. After studying HDFS this Hadoop HDFS Online Quiz will help you a lot to revise your concepts. This HDFS Quiz covers the objective type questions related to the fundamentals of Apache Hadoop HDFS. We will also provide the detailed Answers of All the questions along with them for the better understanding.

Hadoop HDFS Online Quiz Questions and Answers

Hadoop HDFS Online Quiz Questions and Answers

Best Hadoop HDFS Online Quiz Questions and Answers

All the best for the quiz! - Hadoop HDFS Quiz

Q.1 The source of HDFS architecture in Hadoop originated as
Q.2 What is HDFS?
Q.3 Which among the following command is used to copy a directory from one node to another in HDFS?
Q.4 Which utility is used for checking the health of an HDFS file system?
Q.5 Which among the following is the correct statement
Q.6 What is default replication factor?
Q.7 The namenode knows that the data node is active using a mechanism known as
Q.8 What is the default size of HDFS Data Block?
Q.9 What is HDFS Block in Hadoop?
a. It is the logical representation of data
b. It is the physical representation of data
Q.10 Which of the following is the correct statement?
Q.11 The need for data replication can arise in various scenarios like
a. Replication Factor is changed
b. DataNode goes down
c. Data Blocks get corrupted
Q.12 A file in HDFS that is smaller than a single block size
Q.13 Which among the following are the duties of the NameNodes
Q.14 If the IP address or hostname of a data node changes
Q.15 For the frequently accessed HDFS files the blocks are cached in
a. The memory of the data node
b. In the memory of the namenode
Q.16 Which scenario demands highest bandwidth for data transfer between nodes
Q.17 When a client contacts the namenode for accessing a file, the namenode responds with
Q.18 In HDFS the files cannot be
Q.19 Which among the following is the duties of the Data Nodes 
Q.20 NameNode and DataNode do communicate using 
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If you have any doubt about any questions in this Hadoop HDFS Online Quiz, so please share with us in the comment section given below. Hope we will help you.

5 Responses

  1. Sharath says:

    Good to refresh BigData Concepts

  2. Pranjali Chaudhary says:

    Can you explain Q 13. Secondary namenode stores the fsimage in persistent storage. So why cant we recover it if namenode fails?

  3. Very nice to take this quiz.. Thank you so much Data Flair

    • DataFlair Team says:

      Hi Saroja,
      We are pleased with your review in HDFS Quiz. Check out the other parts of HDFS Quiz, you will learn many new things.
      All the best.

  4. Loki says:

    Default size of hdfs block is
    64mb in hadoop 1.x
    128mb in hadoop 2.x

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