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22AI62-BDA & CC MODULE 4 QUIZ

Quiz by Ramya K

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15 questions
Show answers
  • Q1

    What does the Hadoop 'wordcount' example demonstrate?

    File compression

    Streaming input processing

    Tokenizing and counting words

    Sorting algorithms

    30s
  • Q2

    Which command runs a MapReduce example in Hadoop?

    hadoop version

    hadoop jar hadoop-examples.jar wordcount input output

    hadoop fs -put

    hadoop config

    30s
  • Q3

    The purpose of Hadoop benchmarks is to measure:

    Data integrity

     Cluster availability

    Performance metrics

    Security features

    30s
  • Q4

    Which phase sorts and groups intermediate data by key?

     Shuffle

    Combine

    Map

    Output

    30s
  • Q5

    MapReduce processes data in the form of:

    Objects

    XML files

     Key-value pairs

    Tuples

    30s
  • Q6

    Which component ensures job completion if a node fails?

    JobTracker

    HDFS

    TaskTracker

    Speculative execution

    30s
  • Q7

    What does speculative execution in Hadoop do?

     Runs redundant copies of slow tasks

    Combines reducers

    Encrypts sensitive data

    Runs jobs in parallel clusters

    30s
  • Q8

    Intermediate outputs in MapReduce are written to:

    Cloud storage

    Zookeeper

    Local disk

    HDFS

    30s
  • Q9

    In a WordCount program, the mapper emits:

    Sentence and 1

    Word and sentence

    Word and 0

    Word and 1

    30s
  • Q10

    Which language interface is used in Hadoop Streaming?

    Python or Bash

     Only Java

    C++ only

    C only

    30s
  • Q11

    Which of the following is required when using the Pipes interface?

    C++ compiler

    JVM

    Python interpreter

    Bash shell

    30s
  • Q12

    What is the role of the Context object in MapReduce?

    Writes key-value pairs in map/reduce

    Reads input files

    Compiles source code

    Tracks job progress

    30s
  • Q13

    A successful MapReduce job stores final output in:

    STDOUT

    Temporary directory

    Local cache

    Output directory on HDFS

    30s
  • Q14

    What happens if the output directory already exists in HDFS before running a job?

    Job continues

    Error is thrown

    Files are overwritten

    Directory is deleted

    30s
  • Q15

    Which file defines Hadoop job configuration?

    core-site.xml

    mapred-site.xml

    job.xml

    hdfs-site.xml

    30s

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