Hadoop Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Hadoop Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - Which of these provides a Stream processing system used in Hadoop ecosystem?
Answer : C
Q 2 - The main goal of HDFS High availability is
A - Faster creation of the replicas of primary namenode.
C - Prevent data loss due to failure of primary namenode.
D - Prevent the primary namenode form becoming single point of failure.
Answer : B
Q 3 - For a HDFS directory the replication factor(RF) is
Answer : D
Q 4 - The file in Namenode which stores the information mapping the data block location with file name is −
Answer : C
Q 5 - The output of a mapper task is
A - The Key-value pair of all the records of the dataset.
B - The Key-value pair of all the records from the input split processed by the mapper
Answer : B
Q 6 - When a backup node is used in a cluster there is no need of
Answer : A
Q 7 - All the files in a directory in HDFS can be merged together using
Answer : A
Q 8 - What is the default input format?
B - There is no default input format. The input format always should be specified.
Answer : D
Q 9 - When using HDFS, what occurs when a file is deleted from the command line?
A - It is permanently deleted if trash is enabled.
B - It is placed into a trash directory common to all users for that cluster.
C - It is permanently deleted and the file attributes are recorded in a log file.
D - It is moved into the trash directory of the user who deleted it if trash is enabled.
Answer : C
Q 10 - You have loads of data that can be processed by you MRjobs. However you need the data to be available to Analysts and Scients in you organisation. What is the best format to represent the input?
