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hadoop (4.papers)

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hadoop bigdata questions and answers

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3
How to switchoff the "Safenode" in  HDFS?
  1. hadoop dfsadmin-safemode leave
  2. hadoop fdsadmin-safemode leave
  3. hadoop admin-safemode leave
  4. hadoop dfsadmin-safemode
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4
Syntax to run a MapReduce Program?
  1. hadoop jar file.jar/output_path/input_path
  2. Hadoop file.jar/input_path/output_path
  3. hadoop jar file.jar/input_path/output_path
  4. hadoop file.jar/input_path/output_path
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5
What does commodity Hardware in hadoop ?
  1. Industry standard hardware.
  2. Low specifications industry grade ware.
  3. Discarded hardware.
  4. Very cheap hardware.
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6
What does "velocity"in bigdata mean?
  1. speed of storing and processing data.
  2. speed of only storing data.
  3. speed of individual machine processors.
  4. speed of input data generation.
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7
Which of the following Batch processing instance is not an example of
  1. processing 10 GB sales data every 6 hours.
  2. web crawling app.
  3. processing flights sensor data.
  4. Trending topic analysis of tweets for last 10 minutes.
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8
slinding window operations fall into the category of 
  1. Big Data real time processing.
  2. OLTP transactions.
  3. Big data batch processing.
  4. small batch processing.
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9
HBase is used for
  1. Tool for random and fast read/write operations in hadoop.
  2. Mapreduce alternative in hadoop
  3. both a & b.
  4. None.
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10
Hive is used for
  1. Hadoop query engine.
  2. Map Reduce Wrapper.
  3. Hadoop sql interface.
  4. All
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11
Which of the following are not true for hadoop?
  1. It's a tool for big data.
  2. It aims for vertical scaling out/in scenarios.
  3. both a & b.
  4. None
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12
Which of the following is Not a type of metadata in Namenode?
  1. No. of file records.
  2. File acess control information.
  3. List of files.
  4. Block location files.
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13
Which of the following mechanisms is used to create replica in HDFS is
  1. Replicate Protocol.
  2. Gossip protocaol.
  3. Store and forward protocol.
  4. Hdfs protocol.
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14
Name node tries to keep the first copy of data nearest to the client machine.
  1. TRUE
  2. FALSE
  3. true if the client machine is the part of the cluster.
  4. true if the client machine is not part of the cluster
    
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15
Parameters could be passed to pig scripts from.
  1. Shell script.
  2. Command Line.
  3. Configuration file.
  4. All the above.
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16
The schema of a relation can be examed through
  1. DESCRIBE.
  2. DUMP.
  3. EXPLAIN.
  4. ILLUSTRATE.
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17
Data can be supplied to PigUnit tests from
  1. HDFS location.
  2. Within program.
  3. Both a & b.
  4. None.
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