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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.
![Questions and Answers](/images/questions_and_answers.png)
Q 1 - Hadoop differs from volunteer computing in
A - Volunteers donating CPU time and not network bandwidth.
B - Volunteers donating network bandwidth and not CPU time.
Answer : A
Q 2 - Under Hadoop High Availability, Fencing means
A - Preventing a previously active namenode from start running again.
B - Preventing the start of a failover in the event of network failure with the active namenode.
C - Preventing the power down to the previously active namenode.
D - Preventing a previously active namenode from writing to the edit log.
Answer : D
Q 3 - Which of this is not a scheduler options available with YARN?
Answer : A
Q 4 - The information mapping data blocks with their corresponding files is stored in
Answer : D
Q 5 - In Hadoop, Snappy and LZO are examples of
A - Mechanisms of file transport between data nodes
B - Mechanisms of data compression
Answer : B
Q 6 - When a machine is declared as a datanode, the disk space in it
A - Can be used only for HDFS storage
B - Can be used for both HDFS and non-HDFs storage
Answer : B
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 - Can you run Map - Reduce jobs directly on Avro data?
A - Yes, Avro was specifically designed for data processing via Map-Reduce.
B - Yes, but additional extensive coding is required.
C - No, Avro was specifically designed for data storage only.
Answer : A
Q 10 -What is a Sequence File?